Epic.
Besides some very minor/cheep things about this game, it could really grow on you. Like someone before me said, it's worth replaying once you get uberpower.
Pros:
Upgrade system is flawless,
Story is simple, yet funny as hell,
powers areen't very flashy, but who needs flashy when you can eventually clear the damn screen in one shot,
Death...reward? ((Yes, you get orbs when you die. I think it's like the creator saying "This game is a bit cheep so, I'm gonna help you be cheep as well~"))
Cons:
Enemies can get very cheep, very quick ((Final boss especially!)) without Uber,
Boss encounters are a pain early into the game, full upgrades or not,
F**king spider,
No dash ((Then again, this kinda works in the games favor))
Overall? A damn good game worth anyone's time.
Recomended: Level up your armor, Health, and special attack stats asap! Then focus on attack speed/movement. You'll be glad you did.