Quite a nice game,
About the things to improve: I would make at least a little more variable obstacles and make the white sticks visible from further (or maybe just change their colors or make them random, but maybe the small visibility is intentional). A nice QoL changes would be more transparent crosshair and the clear explanation of mid-air jump and some NPC or physical in-world button for shop. Also, please add some music.
I actually spent some time playing this game and having fun, good job.
I'd also be happy if you played and rated my game.