Thanks for playing and the feedback!
There is a system for changing keybinds already actually I just need to code the UI for it, so definitely for the next version.
Flashing runes is a great suggestion.
There's a minimap in the bottom right that should show you enemies in red, and the portal in blue. I'd like to keep ammo and guns away from it if I can, but I'll think about it. When finishing a level and the portal spawns all the ammo and guns are dragged towards it, so you don't need to run around the map when everything's dead.
Weapons reloading after a level, I'll fix that. Actually the shield gun recharges already.
Did you notice you can use right mouse button with the shield gun to use its shield? I haven't really heard anyone use it so I probably need to make it a lot clearer.
I'll paste an earlier response I had regarding the spawners:
Also enemies have armor and that one in particular has a high amount, all guns and effects have different amounts of armor piercing so if you used the SMG vs them it'll take a lot of bullets but others can kill them really quick. I know its not obvious at all right now so you might have missed it, but if you hover the cursor over the guns in the UI to the left you can see their stats (AP for armor piercing). And if you stand on top of a dropped gun you'll see its stats after a moment, can also compare stats if you hover at the same time. For now I think I'll upload a new version with the spawners starting at later levels.
Having them move a bit more erratic is a good suggestion, specifically the green ones I think I'll keep it as is. They're coded to stick together, mostly because I hated how it played when they came at you individually.