This is a quick (roughly 10 seconds long) map that I made using various tutorials as I learned how to use the Hammer Editor. The idea behind the map is to make you think of how to reach the door. The map consists of a single room, with various "opportunities" to reach the other side. You can try your best, but the answer to this puzzle is quite simple.

File Name: Deceptively Easy.zip
File Size: 659.03 KiB
Click here to download Deceptively Easy

The map was fairly simple like you said. At first I was using the Hard Light Bridge, but then realized that it isn't even needed.

Nice simple map.