As a temporary quick fix for the missing "glenn irritate smile.png" error, here's the sprite in question. Simply drop the sprite into the game's "game" folder and then it should solve the problem! The 1.5 patch will be coming in late July as our CG artist being swamped with other projects, so once we get the final CG, we'll update the game! But for now, here's the sprite in question;

(Be sure when you save it, to title it "glenn irritate smile", no underscoring in place of spaces, etc. if it isn't exactly that the game will not recognise it and error out!) Right click > Open in new Tab -> Save image as.

I'm honestly confused what happened to this file, so my only guess is that something messed up during distribution. But placing the missing file into the "game" folder should fix the issue ^^