The controls are explained in-game. You can also click the mouse instead of pressing space. If you get really close to the pipe and survive, you get triple the points! You can use the money you earn to buy upgrades in the shop, although there isn't much yet.
DO NOT ADD TO "ADD EVERYTHING" STUDIOS PLEASE!!!!!!!! I broke the number counters, so don't trust them, the only one that works is the money counter. I wanted to make a more advanced version of Flappy Bird, so here it is. There will be more stuff in the shop some other time. Credit to novice27b for the base, I was too lazy to recreate Flappy Bird myself. Never really played Flappy Bird myself.