Yes, much to the dismay of our sound designer the game really came together late in development, so the sfx had to take a backseat while the four music tracks had way more time to be fleshed out.
As far as genre goes it's not meant to be an idle game but an auto battler, so incremental improvement between fights are the core of the gameplay. If we keep up development the upgrades will be way more varied.
Thanks for playing!