Will be fixed in 1.8B. For now set your resolution in the game menu settings to 1080p and this should be a workaround. Alt+Enter before racing also worked for me, but not for others. Depends on your system resolution and if you are playing fullscreen or windowed, so you will need to play around with settings to get past it.
Well Kal said "a few days" 13 days ago and Dr.Muramasa said no ETA recently sooo.. feck knows.. I am waiting for it to, I do not want to start my solo love route until there is a stable release. I can only guess with a lot of people complaining about the game not working on Linux and Mac since updating the version of Unity that Kal wants to address this (maybe just guessing.) He is also famous for getting distracted and adding in additional new content when he is supposed to be fixing bugs... 😅
Quick Answer - Dunno, hopefully soon...
There is also the fact to take in mind he could also be deep in development of Roundscape Eclipse now, and Starmaker bugs are only getting fixed as and when there is a spare moment. Which would explain the delay. But as mentioned a million times before there is never any update on Status (Not a ETA, nobody wants ETAs from a developer they are meaningless 😅) but just a "Working on X" on the main page would be enough to just know what is going on.