Nice little game! I liked the chill music and the simple art style. The character did feel a bit stiff and hard to control, especially with more powerups. I was also able to wall jump, which I’m not sure was an intended feature. It kind of makes the rock mechanic of the game feel pretty useless, so I tried not to use it too much.
I’m also not sure if I was supposed to be able to jump on those tall, human-like creatures. I tried several times but couldn’t kill them. If jumping over them isn’t possible, maybe you could make that a bit clearer, like giving them spikes on their heads or something like that.
Also, it could be cool if the character changes as I upgrade it, kind of like in the logo.
Overall, a nice little game, and I enjoyed it!