is another excellent release by Lazrael that is easy to learn but difficult to master. The objective of the game is to direct a bat to the top of a dark cave by using the arrow keys. Tap the up arrow key repeatedly to stay afloat, else lose altitude and fall down a bottomless pit.
Like most classic arcade titles, there is actually no ending to aim for. Score points by collecting bonus items while you avoid falling rocks. Touching the spikes on these things means game over.
Getting a good score will unlock items that can be used in subsequent sessions. Most sprites have a set of skins that can be selected from the main menu. To go into fullscreen mode, just press the F4 key.