I also have found that when the corner of the player (cube) touches the edge of the floor or the edge of one of the obstacles then the game crashes, I have no clue why it does that but i'm working on a fix for it. Thanks for all of the feed back, Have fun!
Hey, I posted a game on the windows store do you mind having a look at it?
https://www.microsoft.com/en-au/p/path-rush/9p0ldnqhplcx?activetab=pivot:overviewtab