It's a good (short) game, and I have to say the feel of the zapping is awesome. Don't take this personally though (this criticism applies to HUNDREDS of games on here), but if you're going to have upgrades, you need to have MORE upgrades than anyone can possibly afford in a normal game, so that players have to make meaningful choices. If you have enough meaningful upgrades, you'll get more replays too as people want to try out a different build.
 "Tesla Death Ray"){kind=icon}