Hii, thanks for the feedback!
Here are some informations to make your experience with the game better:
-To switch weapons use the buttons 1-2-3
-Idk if you mean (otherwise the fact that the game doesn't have and actual story) that there isn't a very good guidance in the game. But don't hesitate to tell me if the guidance isn't ok so i can fix it.
I'll add obstacles between the worlds/levels, very cool idea^_^