Adding little combat minigames into a runner game is an interesting idea, but I kinda wish they were more integrated with the running rather than becoming their own little thing which pauses the main gameplay. I'd also say that a lot of the hallways felt pretty barren with just a few things to avoid. You may consider adding a bit more to them.
I also like the idea submitted by b4ux1t3 regarding adding a map that fills in over time. When playing, it almost felt more like an endless runner which never ends rather than a maze with an exit somewhere that I need to find.