Time for some flimsy boss battles. Banana Nababa (formerly known as Boss Arena) is actually all about boss encounters, as you ascend a tower, facing the horrors lurking on each floor. There's a total of six bosses to defeat, and it's quite difficult. Given, I couldn't do it. That's nothing new, though. Arrow keys to move, F to jump, D to attack, and Space to toggle weapon. It has great music too, by the way.
Download it by clicking here (direct link, 2.5 MB).