First off, I had a lot of fun with this. You packed a lot of goodness into a 4 minute experience.
The main things I had feedback on were on enemy model or AI variety, in particular as relates to the long range Q attack. It would have been cool if there were enemies that stayed at range and had a projectile attack so that the Q attack could be a little more useful. Other than the pre-spawned enemies hiding behind the pillars in that one corridor, I felt like most of the time I couldn't zap anyone with the Q attack fast enough.
The other thing I was considering is whether a icon-based cooldown might be better than the colored bars for the abilities. Though I do like how the color of the lightning corresponded with the bars. I'm really not 100% sure which was would be better, but it was something I thought about.
Great job, and I look forward to seeing more!