You should absolutely be proud of it ^_^
With a little more time I bet you can smooth out the technical and gameplay issues and make this a really fun game. The core is there.
Regarding the jump delay, I did something similar on my previous game jam (with my team). We made a space shooter/bullet hell, and I made the decision to have physics based (i.e. slippery) movement, because space! It was our most common criticism :]