Quite an interesting idea.
It would be nice to see something other than text, even if it's just a window with a line and dots. (Think: side view like Mario, but with nothing but a line and 2 colors of dots heading toward each other and disappearing when they are dead.)
Also, it would've been nice to have some info about your enemies so as to adjust the upgrades before the battle. If Bookahooka is resistant to Flotz, I'd like to know in advance so I can pump up my Plotz and Clotz. Ha! Someone who is reading that and hasn't played the game yet is thinking I'm a dork. ;) ..oh, wait. :\
:)