Just a warning... !!SAVING GAMES IS BROKEN!! When you save a game, Prison Architect updates the screenshot and creates a file [prison-name].prison-temp. But this file doesn't replace the [prison-name].prison file. Also the [prison-name].prison file seems to be locked by Prison Architect. If you try ...

Thanks for the new alpha!
Have you ever consider to release alphas more frequently (weekly, for example)?
(with less content/stuff, obviously)

imo, Finish and polish existing features
Finish what you have done so far, move to new stuff after.
Some performance fixes would be nice also. The game gets slower and slower more often then not. (but you can always go around that by reloading/restarting)