Wow, thanks for the (long) feedback! We'll get on the bugs soon, we're doing periodic bugfix releases.
Many of these are good suggestions, and if the game does well, we're considering a sequel or expansion. One of String Tyrant's strengths is that it is small and to the point, with no padding, but a sequel can expand upon the gameplay and still not be padded. So, expect future entries to be larger and have more replayability.
We have some... improvements in mind already for a possible sequel. Stay tuned!