I had the game on fullscreen mode and not windowed and there still was no 1080p option for me. Also, in my playthough of the game, they did seem random but that might be because I had not played the level. Some kind of indication or warning would be a good thought for the game. Also, just a thought now but maybe add some kind of indication of how many enemies will spawn. The reason tower defence games do so great is because that most offer a linear path for the enemies to come from and split these paths off in later stages. I like the more freeflow you are aiming for but an indication of how many enemies will spawn would be nice. Also, maybe some kind of reward for defeating a wave would be nice like additional ore or currency depending on the level. Again, this game is a long way from being a complete game and there are always things you can add and take away to make the game amazing. These are just a few idea. I hope everything goes well for you and your studio.