Awesome entry! This is a very creative take on the theme and I love the combination of a directional game with an incremental game.
This has great potential and with just some juice and polish (and some music) it would be an awesome game. I could also imagine this very well on mobile devices with swiping gestures. Great job!
Some improvement suggestions:
- It would be wonderful to have a showcase of the items bought, like displaying the grandmas and clickers in cookie clicker
- Giving a wrong input should stop the combo
- It is not clear to me if the combo is just for points received by the arrow input or also for the input per second.
- Some pumping music would really go a long way :)