I'll start the map festivities off with my first three maps.
Jump before you leap This first map is a short easy, but interesting map. First one I made and uses well known concepts.
Quad Chamber This map is a very large map with several chambers that all require solving. This one does have some problem solving required, although somewhat minimal. Will take a bit of time to complete though.
You Gelly? This map is entirely gel based. Very simple, but you get to have some fun with physics and practicing aiming your gels and such.
Where's the Switch? Just made this one up over the last couple hours. Has some fun with gels and a bit of problem solving.
Blue Angel And this one forces you to think about the angle that your portals are oriented in order to get the correct trajectory. I think this one is a nice one.
Four Score I took a lot of time to develop a password system to enter each room. I had to dumb down one of the puzzles significantly because of the item limit per map. Having a password system meant I couldn't have as many items laying around the map. In all there's 4 rooms, nothing as bad as Quad Chambers. Overall I'd say this should take 10 to 15 minutes on first try and be pretty fun.