My take on the LD42 theme (Running Out of Space) is: - Plots spawn in a tray and move towards the right - You can drag them into the playing area to place them (Left mouse button) or immediately summon the last one in the tray to your cursor (Right mouse button) - If they reach the end of the tray without being placed, something bad happens - The playing area is of limited size, and plots placed down destroy any existing ones in their way - You score points at some interval for all active plots - Placed plots age/grow over time, becoming worth more points per scoring interval (this didn't get implemented...)