Potential fix for players losing progress and new achievements - Beta branch

Hello, people living inside my computer.

I have pushed an update to the game that tries to address the issue some people have been dealing with after a power outage or a sudden crash. For those losing all their progress after this, I sincerely apologize and hope that this fixes it. There is really no way that I can personally reproduce and test this bug, as it only happens to some people and not others. Me being just a guy with a funny hat, can't really do much to really investigate what is happening. But I can try!

I'm first publishing this patch in the Beta branch of the game beacuse dealing with save files is a very delicate matter. If I don't get reports of data loss or other issues here, I'll move this build into the main branch.

I am also adding 3 new achievements and one new set of upgrades. These will only be obtainable for beta testers until I set this build live for everybody.

Edit:

I have updated the beta build with improved Slap Multiplier upgrade values. With every upgrade maxed out, you should be able to reach 1 billion slaps in a little under 14 hours of continuous slapping, which divided along many play sessions shouldn't be too difficult.