I had some problem with the game. On the first video screen when you must shoot through multiple camera to get the first key, it crashed the webGL player everytime.
So I bypassed it and just kept going forward in the game. So I eventually got the 3 last keys and wanted to try to get back on track to the beginning of the level to get the first one again.
However the entrance to the beginning was blocked by a cube, so I was locked with 3 keys on 4. I dunno if something was supposed to happens when you clear the game, but hey.
I liked the idea of the feature, shooting through camera to kill ppl. However some stuff like the box to hide into were properly useless to the gameplay. There is no way to even access the boxes without being seen or shooted. So you just shoot everything without using them.
Also the design of the levels was very poor, I was damn lost, cause every single room and door looks the same.
But overall I enjoyed to play it cause of the main feature !