Hi! it’s a know issue unfortunately.
the itch io launcher is using a really really old version of chromium (v87). the current version is v119. This is because they have been working on a new version of the launcher that is not yet released.
I’d totally suggest to just use an up to date web browser, it will work faster there and look more beautiful. (and most importantly, it will be more secure !)
The game is super light, around 371 kb. it will load instantly , no loading time, no issues.
But if you encounter any problem please let me know. i have contacted itch.io regarding they platform and they have this updated version under development since last year… so it should come anytime soon..?