What was the problem? Did it threw an error? Or was it something else?
You can try to install LÖVE and run the love file instead if you still want to try it.
As for a web version, the game was simply not compatible with it.
Right, I don't know how to make the game work on a Mac as I don't have one to test, the build is only for Windows, but I managed to make a browser version of the game here: https://eliasjosue.itch.io/bloodstabbed-web
Awesome! Thanks for doing that; word of warning, the web browser version does create some strange artifacts, so there are 8+ colours on screen at a time, having looked at your screenshots I can see they're much cleaner and adhear to the 4 colours rule, but despite that issue... Wow! That is super hectic hahah Love the art, the music and gameplay (despite dying every second the first two play throughs haha) Couldn't get past that awesome boss, but never been a fan of keyboard controls, so not surprising.
An all round great effort, I was looking forward to playing this having seen your progress posts on Discord and I'm certainly not dissapointed :D