Good job. Think the concept is pretty funny, and trying to find secrets in the map is always fun.
The weapon switching felt a little awkward, but I think that's more my brain kind of defaulting to Doom controls. The time limit also felt really strict, but I don't think you could raise it too much without losing the challenge.
Thank you, I appreciate the feedback!
The weapon swapping was intentional (my nod to the Atari 2600 only having 1 button).
As for the time limit, my intention was to allow the player to modify the time and enemy count, unfortunately I did not organize my file system and ended up wasting my last few hours trying to prep it for release without breaking everything, and didn't have time to implement the last couple of features.