The art style is wild, I adore it. The portal transition especially looks cool, though I didn't get the point of the portal. Was I supposed to find something or pickup things? But other than that it was a pleasant time, thanks for the game!
The maze is randomly generated, and you must find the exit before the next wave begins, or you'll be in trouble. At the end of the maze, you'll find resources to build new upgrades, such as turrets and more.
