You can already play the full game if you got the Early Access tier. It's fun, although it's less of a Metroidvania than some of the previous games. Might be more similar to Pirate's Curse, but I haven't played that one for myself yet.
All right so I've gone all the way through the first four worlds and I think I've seen enough to form an opinion.
Its pretty ass.
Like, the gameplay is mostly fine. Some fucked up hit detection here and there, but its pretty clear the designers had a plan and stuck to it.
The problem is that plan is super annoying to play. They wanted to make it more linear, which is cool with me I don't mind. But they also didn't want to lose the exploration, which is a pretty huge part of the Shantae games. Ok, yeah, you can certainly try doing both, Pirate's Curse certainly did and did it pretty darn well. But what ends up happening is that you just end up having to do levels over and over again with your new upgrades looking for spots you couldn't open before. In a metroidvania where you unlock shortcuts and mobility upgrades, that's fine and cool, but in linear levels, it just means doing the whole thing all over. That sucks. I've already done the first level 4 times and I know I'm gonna have to do it again, probably even multiple times. And I just made it past world 4. I've already talked to the NPCs in the hub and to gain access to world 5 I'm going to have to do level 2 and level 3 again, except oh wait I already had to redo level 2 to get into world 4 in the first place. And I still don't have the dance that lets me actually swim, so everytime I explore a body of water, if there's a spot I can't reach with my current diving ability I know I'll have to do the damn thing again.
When I see a new obstacle I can't clear yet, I don't think "Oh boy I can't wait to get my next upgrade that lets me go through that". I just sigh and resign myself to the fact that I'll have to do this shit again. That's killer for a game that wants to do exploration. It's like having to do Elec Man's stage again to get the Magnet Beam because you did the wrong boss order. Except this time, its not because of anything you did, but because the game is made that way. And also its not just once, but every single fucking time. They want you to backtrack as hard as you did in every other Shantae game except they don't make it fun to do so. Risky's Revenge had warps and shortcuts, Pirate's Curse shits out mobility upgrades and gives you a freaking shinespark. In 1/2 genie hero, you get monkey form and a warp dance that only goes forward and costs a (admittedly cheap) ressource. So yeah, oh boy a crab upgrade in the second half of the second stage how cool except now I gotta leave the stage and head back in cause lol I needed that upgrade in the first half for a collectible. Its a pain in the ass and I dread moving forward in the game because I know it'll just make me do the same things I've already done just to get to the real game.
The bosses are also pretty awful. I don't think any of them made me think about their pattern more that a second. Half of their patterns is completely trivial to dodge, as in, they're not even aiming at you trivial. There's a few cool moments in most of them, but for every nice pattern, there's usually a pattern where the boss just does its super move at nothing in particular and you don't even have to think or even move. Wow, that laser sure is cool, and its even rotating my way, except you started it in the absolute wrong direction and it can barely move 45 degrees before it stops. Whoops. The third boss is especially a mess. Like its just awful. The first half of the pattern will never hit you. The second half you'll take damage because the hit detection is awful.
Speaking of damage! Health design is terrible! You start with very low health, fair enough. Damage scales very quickly and health ups are locked behind upgrades you probably don't have yet (but hey you'll redo the level later anyway so you can get it there!), so you need to make up for it. How? Well, the game is very generous with healing items! That's nice! But it also mean that soon enough taking damage means going in the menu to use them. As far as I know, there's no way to have healing items on your quick-use menu. So you've taken a hit during the boss's cool pattern? Time to pause, eat some oranges, takes a piss break while you're at it oh hey you need to feed your cat wait no mittens get off my lap ah geez. Best part is, eating a food item makes Shantae do the whole exagerated eating noise thing. All right, cute, that adds personality and charm, that's nice. But then you have to wait for Shantae to finish before you can eat something else. Its not long, about a second, its not that terrible. But when I'm eating my freaking oranges during a boss fight, and I need to eat 3 of them to get to full health again, then that's three seconds where I'm just mashing to get it done as fast as possible. A nitpick for sure, but it is also a symptom for what really annoys me about this game.
It clearly wants to be a speed game. The movement is clearly the movement a fast game would have. Shantae moves and controls in a way that makes you think and feel that that jump should be possible if you go fast enough. Half the platforming obstacles promote speed. Crumbling platforms, rising floors and the likes. They also give you a fairly nice mobility form very early with the monkey form. I love running and jumping as a monkey! It feels so good to climb a wall real fast, jump off, cling to another wall and keep going. I have some issues with getting stuck to walls, but that's mostly on me and I know I can improve on that. That is really cool. In fact, it gets me into a real groove. Except lol there's a timed obstacle now time to wait. What's that? You want to jump on that platform? Better wait, cause that enemy covers all your jump arcs for two seconds. Touched that laser or those wall spikes? Time to do the whole room again! Dances are also a factor that kills momentum. Hey, that vertical shaft looks fun to climb as a monkey! Except wait there's a block there you have to destroy and monkey can't attack gotta turn back and oh there's more shaft past the blocks time to transform again. To be fair, the dances are a lot (LOT) better than in Risky's Revenge. But there's still the animation to start dancing and the transformation animation to go through. They're not long, but its something you see everytime and very often and it quickly adds up. Risky's Revenge is a lot slower paced so it can afford to have slow dances. You don't have to shift form very often because the way its made, you have multiple puzzles to solve with that form before you switch back again. In 1/2 Genie Hero, they'll show you a pool of water to crab into, then they'll make you turn back into regular Shantae so you can reach another pool of water that's half an inch away, but unreachable if you remain in crab form. The game just can't decide if it wants to be the slow paced metroidvania that the first two games were, or the amazing linear speed game that the third game is, and it ends up just giving the worst of both: a linear platformer with upgrades that don't make it more fun to go through levels.
Also, I'd had a couple of times where checkpoints were messy, putting me back in the wrong rooms. Also, don't go in the gallery if you're using a remapped keyboard, cause lol you can't exit! And also my eyes started hurting at some points, including while moving too fast in the hub, so careful with that.
For all my words, I don't hate the game and I don't regret backing it. Most of my problems are opinions so if you like it or want to play it, don't feel intimidated by my wall of text. I wrote it because I care about the game enough to do it. There are good parts and it can certainly be an enjoyable game. Its just that there are deep flaws that have been souring me on the experience so while I can say its a "good" game, I can't say it's a "great" game. My opinion could still change, I'm not done with it yet after all. I'll probably still try to 100% it. But Pirate's Curse was much better :P
tl;dr there's no tl;dr read my shit you nerd