I saved to file and refreshed the page and when it finished reloading I had the same upgrades as before but everything had reset to 0 times destroyed and I don't think I had any money. When I try to load from file and it asks to overwrite the current game, the yes option does nothing. Thanks for the fun games and thanks for listening!
The easiest way to get him to max damage that I've found is to get him stuck in some spikes with a gun (I used the Flashkiller) underneath him and subzero coming down from above. It might take a while to set everything up right but if you do he will get stuck in the spikes/lasers and get smashed against the freezer but be unable to enter the freezer because it is too close to the wall where the lasers are.