Design: Messy unclear layout. Placing loads of random cubes around the map just shouts out laziness, which is obviously the case since you seem to be proud that you've only spent an hour on this. The only detail at all is the random boxes. Very poor, lazy and sloppy work.
Gameplay: The limited use of textures and the lack of lighting makes depth perceoption tough adn kills the gameplay. Only chance of playing this is to rnadomly run around and hope you run into someone.
Looks: Zero lighting - extremly bad and lazy, especially when maps with huge skyboxes usually only need a single light. Only 2 textures just makes this map look even worse.
This map may have been ok for a 1-hour-done pre-pre-pre-alpha that was not ready to be released at all, but it is certainly not ok for a final release. If you are not going to spend more time and effort making something worthwhile, I suggest you stick to just playing maps and quite making them altogether.