Using levels from various home, console and hand-held incarnations of the original Bubble Bobble arcade game, the authors of this romhack have created a brand new game based on the original arcade machine.

As the original, Bubble Bobble: Lost Cave is a platform game, with each level being a single screen. The enemies must be cleared from a level to go to the next one. The player can jump and collect items for points (such as fruit) and blow bubbles. These bubbles can be used as platforms to leap on, or to trap enemies. Enemies trapped in a bubble must be popped by jumping into them, turning them into fruit that can be collected for points.