Every time I try to start a new game it freezes right after I spawn.

I got this game when it was right about to go 1.0, I played it for a few years, took a break and came back about a year ago. Now it wont even let me play my $20 game. Every time I try to start a game it either freezes at the load screen or right after I spawn, nothing moves and I can see my mouse pointer. Please fix this soon so I can keep on crafting.