Thanks for the feedback! We planned on mirroring the controls to WASD too, unfortunately we ended up not having time to do so due to the priority of other things hehe (even being simple to do). We feel however, that arrow keys are pretty conventional too, especially when you don't have any use for the mouse. We plan on possibly adding some small control indicators in the first level, we figure it would help as well.
Thanks for the tips!
We checked your game too, pretty fun, keep it up!