Oh shit, I just realized what probably happened. There are still debug controls in the prototype. The "K" key resets the save file. You probably pressed it and ran into a checkpoint afterwards.
I'll have to be more careful to remove such controls in the future. :/
Sorry for the inconvenience. Thanks for trying the game still!


and respawned without the pistol and upgrades? Please confirm and tell as much as you can. I will investigate that one this week.