Aaaawww sound please.... pretty please
The game you created here (on your own, being the only team-member) for the game jam is awesome. You coped well with the colour handicap and the engine is really fun to play.
It's sad that you couldn't add the sound but I would reaaaaally love to see it with sound someday. You should consider updating it when you get to it.
Adding the ability to run was really a good idea, but when running it is hard to control everything properly. I think you would have been better if the down arrow key was the RUN button, since you use the other three arrows anyway and it's uncomfortable to stretch your hand over to the spacebar from either WASD or the arrows.
Also when I tried to move in circles while running and shooting the char didn't turn anymore. (too many buttons at the same time? :P)
Apart from that it's really fun. I think the ninjas where an awesome idea and the boss fight was pretty hard until you find out how to handle him.
All in all a great entry and if you had had the time to add sound it would have been even better.
5/5 & 10/10