And that's... a really good point. With one of the design goals being to focus on how much I can get out of a input system, it was an oversight to not stick with only using the arrow keys. Thanks for pointing this out, I'll put out an update to fix this.
Hehe, I tried to mimic the quick play sessions of Super Meat Boy, Devil Daggers, and Super Crate Box, so I'm really glad this was the case! Thank you very much!!
Thank you for the feedback! That was the idea haha. I hope you didn't find it too hard, I was thinking about tweaking some of the speed/hp values but unfortunately ran out of time :/