Your first jam, you say! Well it was an excellent go for a first jam. I'm not just saying that, either. 18k people signed up for this and just a bit more than 5k submitted. Well done, dude.
Scope is hard to get a handle on without experience and I'm glad to see you got some of that here. The fact that you got something this finished-looking at all is a testament to your ability to adjust your scope on the fly and push something out. Again, well-done.