Thank you for testing! If you like, you should definitely try the multiplayer part of the game which is the main focus for now.
The single-player consists off a short campaign section. Once you reach the hub, you can try out a survival arena mode and several boss fights.
The physics are pretty floaty and that has definitely put people off of the game. I think it helps to view the game more about moving around with boosting (right click)/fast falling and treating jumping/walking as more supplemental forms of movement
eggplants were used as currency to unlock new weapons and upgrades, but for the purpose of the demo, everything starts off unlocked.