In Balder2D, players control small probes which shoot tiny projectiles with which they try to destroy each other. It features a 2D overhead view of the playing field. Probes may be human or computer controlled.
A probe can perform the following actions:
    * rotate
    * fire projectiles
    * "stick" to a wall
    * push off of a wall
Players menuver their probes around the playing field by sticking to walls and then pushing off in a new direction, while trying to shoot the other probes and avoid being hit by projectiles.
Games may be configured to have a time limit, score limit, and/or life(respawn) limit.
    * Time limited games have a timer in the upper left, which counts down, and the game ends when time runs out.
    * Score limited games end when some player reaches the maximum score.
    * In life limited games, the game ends when only one player remains
