PLETHORA

It's a very simple platformer about a space robot collecting energy drops in an inhospitable land. Every time we push the green button at the top of the screen, a drop appears at a random place and we have to collect it; and at the same time we get one more enemy on screen and they will follow our every move trying to get us.. aaaand our energy drops.
The idea is to make it more difficult, every time we summon a drop.