I really liked the glowy, futuristic look of the game, and all of the mechanics ran very smooth.
Here's some advice:
1. Add some sort of particle effect to the pickup items to make them easier to spot.
2. Add some text at the barrier at the end that explains to the player why they can't enter the final room (i.e. they haven't collected all of the items yet).
Other than that, the game looked and felt better than a lot of the submissions I've played so far, so good job!