Glad you liked it! And yeah, the respawn time was set really low, so I could show the gameplay in front of my class faster. The optimal ammo count should be around 6-8 somewhere, with a shorter pause between shooting.
Also thought about making it so the squares in the floor can fall down as time goes by, which would add a bigger challange and also give a use to jumping. I didn't have time to put it in, but may do once I get the time ^^