This is a crossover between Ragnarok Online and Megaman

It's a short game, and a bit experimental. Nevertheless it has full content, complete with 20 different enemies, multiple weapons and equippable cards, and a full-fledged boss at the end.

Controls:
Arrow keys to move
A to jump
S to shoot, hold to charge
D to use sub-weapon
Space brings up the pause menu, you can also use your mouse
(Also try sliding, wall jumping, and divekicking)