Pop a balls

One button game genre about shooting bullets to pop a balls.Control:- hold 'z' or 'left click' button for fire bullets. - Firing bullets will make player move slower.* v 0.2.2:- add levels.- game difficult base on levels.- support mouse.- improve graphics.*v 0.2.3:- tuning difficult levels- add background.*v 0.2.4:- improve gameplay.*v 0.2.5:- export with new pico8 version.- add binary for windows, osx, linux and raspberry pi.