Help on sprites in a Game Jam

Help on sprites in a Game Jam

The game jam theme is a game to the past...

And my game is a "Comical action"(Snow Bros,Don Doko Don,etc...)

I need a 18x28 images sprites,for this(for the tile set 16 x 16):

Characters(with the bullet sprite(obviously))

Tileset

Enemies(2 for level)

And the Boss

You can participate in the demo,and your name appear in the game...

A demo simple,with 5 levels and 1 boss...