Hi, thanks for the nice words!
In order to give the patreons a benefit overall, I try to keep them always one version ahead. So 0.2.0 will be free probably in august/september.
In order to update the game sucessfully, you only need to save when the "SAVE messagge" shows, then download new version, then load and continue the game. I know there's a bug updating from 0.1.0 to 0.1.5 but the update from 1.5 to 2.0 is working fine!!