Nice game 4/5, thought of a lot of things should be in a #2, like upgradeable specials(slow, shield, teleport), an upgradeable special bar(amount of specials allowed), and nukes(clears screen, amount increase per upgrade). Slow, the duration of slow is increases. Shield, the amount of damage the shield can take goes up(color changes as well). Teleport, the amount of clicks per special bar goes up, also deals damage to enemies in the area of teleportation(goes up with each upgrade). One special at a time. Other weapons would be cool like a pistol, machine-gun, shotgun, rocket laucher, tesla-gun. Pistol, regular damage, and firing speed, a multishot. Machine-gun, low damage, high firing speed, critical shot. Shotgun, high damage, low firing speed, pellet spread. Rocket laucher(explodes), very high damage, very low firing speed, explosion size. Tesla-gun(shot chains to enemies), very low damage, very high firing speed, amount of enemies that can be chained.