Yes, you're right, this game in its actual form is very (too ?) simple/minimalist. I know I could add more things like speed changing or direction to choose, and more different levels. But it's only a gamejam project made in few hours, so I focused more on the music (it's my job) than the rest of the game (level design, gameplay, ...). If one day I want to make a bigger game from this gamejam project (but it's not my actual priority, to be honest ^^), I'll create my own graphics and do better variety of gameplay, ennemies and levels, with a lot of funny and cute cutscenes. Thank you for your nice and constructive comment ^_^