You mean the main menu itself crashes as well? (That's what the comment you replied to said, which should be optimized a lot by now in v0.2.1.) Regarding the save/load stuff it works fine for me, even on android (aside from the load menu boxes being placed weirdly, which I will fix at some point), but you do have to save first or have some auto-saves or else you won't be able to continue. (Which I just noticed is kinda unintuitive, since by default renpy only puts a save button inside the menu itself when on the phone version.)