Bad.
I'm going to be completely honest with you. This was crap. Looks like everything was whipped together in under five minutes, ten minutes maximum. You made the game longer by adding the fact you need to tap the spacebar, and your "Runner" only moves around half-an-inch per hit. The graphics were very, very simple, and the concept was ... bad.
Anyway, here's a constructive review:
Pros:
N/A
Cons:
- Simple graphics
- Terrible concept
- Too short
- Just bad in general
Look, I'm sorry for giving this such a bad review, but you probably knew it was coming. Just put more time and effort in to your creations, and you will get better feedback.