Hi! This game was a bit of a talking point between me and a few other decker users when it came out (Your pleasant soundscape, choice to do purple 1-bit, and the very smart card transition with the subway doors) but I'm also really sorry you encountered crashes with the program (and that often too? oof)
(I'm sorry to be nosy about this...) Did you do your development in the web version of the program? There was a recent issue that caused crashes while changing fonts in a specific version of web Decker. :( It's fixed now but I'm very sorry if that's the one that got in the way while you were making such a lovely project.
And if it wasn't that, do you remember what was happening when it crashed?