its pretty good
i enjoyed this a lot, there are a few small issues here and there but nothing too big. Like how the walls would eventually disappear, you should be invincible from that wall as soon as it starts to disappear, I think you already have it like this to an extent, but I often found myself losing health for touching a 'disappearing wall'.
I really loved the flow of the game though, the artwork and everything was really great. Maybe have more of a progression through the game, like the further you get, the harder the walls become. I like how you have stars to collect, but I want more of an objective to keep me playing! Have some achievements or something for the sequel k?
I really enjoyed this game, I really hope you make a sequel one day :)
:3