I think the visuals are very strong here, cool shaders, strong colors, cute slimes, nice sound. Good job!
I had a bug where i can't die so gameplaywise wasn't able to fully appreciate it. If you would continue development tho i say don't hang onto the balls mechanic. It's cool but doesn't wanna make me play again. And spawn way more slimes. They are cute, so you want to have as many as possible