Health pickups

[cxong]

No description provided.

[cxong]

The feature itself is just part of restoring Cyberdogs gameplay, but it is an interesting design change. Done well, the health pickups encourage the player to keep moving, and discourages being overly cautious, improving the pace of the game.

A few ideas to implement this well:

• Based on a timer, randomly spawn new pickups in unexplored (or failing that, out-of-sight) areas on the map if the total number of pickups falls below a threshold X, where X scales based on map total tiles (careful: not the same as width * height!)
• Don't spawn pickups too close to each other (perhaps this is enough to guarantee an upper limit?)
• Scale up rate of spawning based on damage taken
• Scale down rate of spawning over time