Very nice shooter. The simple abstract art style fit quite nicely!
Since the health packs spawn quite frequently and the player's speed in the main mode being quite good you don't have enough incentives to "go" to survival mode.
Still the shooting part is very good!
You should avoid combining the pak file with the executable. It is known to trigger false alarm with AV.
And always make a web export since It's so easy to make one with godot (speaking as a fellow godot game dev ;-) )
The absense of web export can really hurt in game jams.