The mac version does not work well, there is no text or portal visible. Luckily there is a browser version. Love the idea its silly, original and weird. Would have been cool to see this theme better in the levels/other assets. thats its a bit more about feet or something that fits. And for me the sound volume was really low not sure if its my computer but i had to turn it up a lot to hear it.
Overal its a fun experience, i would delete the mac version since without text and a portal its just unplayable but as you say it has not been tested.
The game would also benefit with some music (or maybe i could not hear it) and also more diverse level assets, it seems to be a bit empty. The feet is funny and the idea of firetrucks as enemies fits the game perfectly! Would be great to see more (bad)jokes trough out the game to really make it a weird funny game i would say :)