[ThpsPsx] Support powerup creation #48
Description
Original game inherits Apocalypse way to address the game objects, calling them powerups.
Powerups are:
- bonus points
- cash
- skate points
- level specific collectibles (i.e. 5 pilot wings)
- stats
- decks
- cds
Basically all we need is a position in the game world and powerup type. Can just interpret some cube as a powerup, based on its name or texture.