I really REALLY wanted to like this game.
The outlining components are fantastic, the music is fun, the graphic are great, the UI is well done and the game is very well explained, but sadly the core mechanic is absent.
This game, well, isn't really a game. I, the player, am not required to do anything, I don't need to show skill, I don't need to make decisions, I'm not required to any meaningful input. I just have to click forwards until I'm low on hp, grind, buy an upgrade and continue forwards and...that's it! There's nothing to spice things up, or make me stop and think. Therefore it is simply not enjoyable.
I think you got talent. You got everything it takes to make a great game, put some thought into your mechanics and look at the game from the players' perspective and ask yourself "What is required of me?".