Click the buttons to buy stuff, and then place it on the level. The egg and black box can only be placed on clear, white background. The shooter needs to be submerged in black background. Don't let the enemies deplete your Flag points. Both bullets and enemies are affected by gravity.
This is inspired by a browser game that I never saw again. I had it laying around in my trashed projects for practically ever, even though it's still pretty fun to play and seems decently challenging at first glance. So here it is. Have fun. I added the black box just recently, feel free to give feedback on that one especially. Do not criticize the egg.