The sprites have been created for my small game based on Atari 2600 "Adventure" game. I've never finished it but I think I'll get back to this project one day. Anyway, I put there these sprites.

Each sprite (except the boss) is 48x48 pixels and has only two colors. The boss is 96x96. You can easily scale down each tile. 

The ZIP file contains set of separated tiles so you don't have to do it manually.

Enjoy ;)