For a 3D FPS entered into a 72 hour game jam, this is incredible. It runs smoothly in browser. The gun has great feel. There's a cohesive visual style, a clear vibe and mood, and the upgrades felt meaningful. There's a lot to love here!
The visual effects were a bit too crazy for my eyes. To me, it felt a bit like driving into the sun more than something that would meaningfully affect the way I play. But I get you needed a connection to the theme.
Some other ideas for improvement (and possibly all things you already thought of but just didn't have time to implement):
- Weakspots on enemies (like headshots). While I understand each enemy had different attacks and movements, I generally approach every enemy the same. Run backwards and spam bullets. So having weakspots where you have to get behind them or aim at a certain position would maybe help vary the gameplay a bit.
- I never really found reason to use the sword. Getting close to the mob of enemies chasing me felt like a death wish, but maybe that's a me problem and I was a bit too passive in my playstyle.
- A bit more level design love. I think things like weakspots in enemies would help create more of a reason to use verticality.
All-in-all, this is an incredible achievement. A 3D FPS in 3 days that has good feel is not easy by any means. Well done!