I really enjoyed this! It took me a while to get used to, but once I did I found a good rhythm. It was a stressful trying to upgrade my towers while I slowly ran towards death.
I wish there was more info about the different types of towers. Maybe a list of their symbols and what they are in the tutorial would be great. I was very confused when I first started buying towers (and had very little time to do so before my runner died) because I didn't know what anything was.