Are there any alternatives for paint?

jspaint.app/

https://itch.io/jam/paint-jam-2020/topic/729141/is-mtpaint-also-okay is related

There is apparently MS Paint for XP on archive.org https://aur.archlinux.org/packages/mspaint-xp-bin/

It appears that jspaint can also be launched as an electron app:

git clone https://github.com/1j01/jspaint && cd jspaint && npm i && npm start

And there is also GNU Paint https://en.wikipedia.org/wiki/GNU_Paint

paint.Net is a good alternative, that is allowed in the jam!

https://www.getpaint.net/