I really like the movement mechanics and the feeling of momentum, which can be stopped by hunkering down. The music adds some nice tension, but gets repetitive after a while. Some SFX and further polish would certainly help if you were to continue developing this idea.
I didn't really see the purpose of the yellow bar at the top. I noticed it slowly depleted whilst moving, and went down quickly whilst holding "Q" to flare, but it didn't seem to recharge when you didn't do these things and when empty it just automatically fills up again without any explanation. So don't really see the point of it...what am i missing?
Otherwise well done for incorporating both the TRICK and TREAT mechanics in too! good stuff!