Sci-Fi College: Alien Attack

Aliens have landed in the city and are running rampant across. The military has been deployed to evacuate civilians to different strategic evacuation points. One of the points is located at the City College, where a group of students are trapped. They need to escape their classroom and make their way to the roof of the building. 

Easy enough? Wrong. The college has been hit with a series of explosives and part of the roof has collapsed on itself, causing debris to spread throughout the building making it hard for the escapees to get through, they will have to solve a series of puzzles to get to the roof exit and escape before the helicopters leave. 

There is a time limit for each room before the debris falls on top of the survivors. The helicopter is waiting for you.