Player gains score for every room he completes. The end goal of the game is to complete as much rooms as possible.
Rooms are becoming heavier and every time introduce the player a new mechanic and upgrade enemies at the end of each cycle.
Endless Levels and Upgrades
Player has XP for every killed enemy, the XP varies on the enemy level, room level and the skill of player. Player can exchange XP to buy new weapons
or upgrade them (weapon upgrade is also endless at the moment). Some of the upgrades unlock unique weapon mechanic.
XP can also be used for unlocking new levels. Player can find useful items on every level.
Player can also upgrade 5 skills of his character.