If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Your house can fly. The more balloons you collect, the higher you can fly. When you have at least one balloon, you can move your house. Avoid bombs, they can blow up your balloons. You can drag and throw bombs. Complete missions to earn extra points.
W, A, S, D / Arrow Keys - Move.
Mouse - Collect / Throw Bombs.