Level class refactoring

Last three days have been quite productive. I have searched through Level class which is 3500+ lines of code. Many routines need either fixing or test how they actually work in the gameplay. I think the worst example was a routine searching for free places (when game objects are spawned). It doesn't work like it should, but when I change it data-driven it should fix most of the problems. I've also learned that everything should be check only once, because you will have extra rules and if that another routine doesn't check them it fails. There must be something like that because sometimes there are plants created on walls. It's bit of a mess, but it's going to get better soon.