-CONTROLS- WASD to move Click to shoot Touch the bottom left to open shop 5 XP for each upgrade -UPDATES- 31 May 2016: initial release, added shop, added twin 1 Jun 2016: added triangles, made it more real, reworked levels 2 Jun 2016: bullet penetration and max health 4 Jun 2016: tweak a little of the bullet penetration script
