Thanks for the feedback!
I've been working a bit on the game since and uploaded a new version a few days ago.
I agree that my game is in need of better graphics but I hope the post processing and sound I've added make it more visually pleasing.
Thanks for playing the game and the kind words!
Much better now. With endless levels and maybe some kind of a shop, i can see this being as a plausable casual game a decent amount of people would play on phones. I would recomend to leave it as it is and go on with a new project to refine what you learned.
Repetition is often the best way to go before learning more and getting overwhelmed.