I was checking a suspicion of a regression in version 0.2.0c and discovered this minor inconvenience. When a newer version cart is loaded into an older version PICO-8, it errors out with "Could not load $filename". Technically, it's correct, but the same error is shown when, say, a given cart file is missing. I find this messaging confusing: it took me a while to realise that the file is fine and it's the version mismatch that causes it.

Suggestion. Make it forward-compatible: error out with something like "cart version unsupported".

(FWIW, I was trying all this via command-line)

Bonus small bug: non-lower-cased message word "Could" is rendered in the puny font, while the rest of PICO-8 UI does not use it.

Demo.

$ cat newer.p8 
pico-8 cartridge // http://www.pico-8.com
version 42
__lua__

$ pico8 -run newer.p8