Ok forget that last message as I was wrong, but here's what happened
It turns out that only on the first startup after a restart will blockland work, after that, it won't work anymore. So I got my brother to try and help, and because the laptop I use actually doesn't have a GPU, here's what he did:
-Reinstalled blockland again
-Ran 2 different types of anti-malware drivers to try and detect problems
Yet even with that, blockland still wouldn't start up. Luckily though, I have a steam blockland for dire cases like these, which my brother tried and that works perfectly. During this time now, I'll be using blockland on steam and be known as Ragekiller until something is done about this.
If I had to think, I would guess that something happened to blockland the last time it shut down that made it get a bit corrupted, leading to the program not opening after the first startup. For now this issue is solved, but I would still like to see if there are any solutions to this.