This game would be kinda interesting and nice to play if it would not feel that unfinished. I am already caught three times without possibilities to continue the game - so it is kinda bugged and annoying to play.
If you have some troubles with the alarm system puzzle:
You have to use your mirror on the water and see the colors of a rainbow. Then go to the electronics and type in one after one: blue - purple - yellow - green - red - orange.