I really like the game, the one thing I'd change is making you not be able to move immediately after falling on spikes. When trying to get across spikes, you're probably gonna hold the direction key, which leads to if you die falling in 3 or four times before you can let go of the key. Other than that, I've been having a great time crawling around in it so far! It's already really good for exploration, which is what you want in a metroidvania.