Bugs/Errors: In the basement area you can keep going to the right and fall off the edge of the level.

Strengths: I really like the portal mechanic. It's fun to use and could lead to some really interesting and creative puzzles. You also made it so you speed up while falling so you can do that thing where you put a portal on the floor and a portal on the ceiling, and then fall forever, which I very much appreciate. I also liked the character design and how they become all static-y when you fall in a pit.

Weaknesses: The main menu icons weren't very clear on what they were. I suppose you could just click on them to find out, but some labelling would be helpful.

Changes or improvements: Aside from making the main menu clearer, I'm not really sure. Maybe it could be a bit clearer what you are supposed to do in the basement of the building, since I wasn't sure what to do at that point.