In level 28, I found a glitch. when you create a portal under the highest cube, and make it come out on top of the blue beam-platform thing, it loops back to the first portal, as though it was going back through the yellow. then when you make the first portal back at the start door, and push the cube through the second portal, the cube warps back to where it started, making the level impossible.
I've played this game on a different site, but when it asks for you to rate your computer speed, it won't take my choice, it just stays there on the same screen... the buttons are broken...
you should add a cinematic where the character discovers the source specifically for the mutation, and an explanation for the hospital exploding. 2/5 for easiness and lack of strategy.
too easy, got 6th on high score first try, and wasn't trying very hard... bananas need to look more like bananas, music I don't really like, and game play is unchanging, 2/5.
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