everything that i build gets distroyed, trees i take down come back, tunnels dissapear.

Put the summary of the bug you're having here

What I expected to happen was...:
i would start the game in the house i built

What actually happened was...:
i started the game where my house was. trapped in solid rock. and died.

Steps to Reproduce:
1. start the game
2. ...look at all your stuff that you built, or dug out.
3. ...count how many houses, chests, tunnels, gardens,... are GONE. and replaced by rock, or water, or lava, or dirt, ect. that was not there before.