This is a small, abstract shooting game from Japanese developer Kuni. It is a 'caveflier' in which the exhaust from the engine also serves as a tool to erode the cave walls.
Your goal is to fly upwards as long as you possibly can, without crashing against the cave walls and the window borders.
This little game is okay to kill some time, but could use improvements in sound, graphics and gameplay. It is a second port of an old game, so this is somewhat understandable. With some work, this game could be much more enjoyable.