I enjoyed it, and will replay it to beat the boss for sure! I like that there is a learning curve - what blessing to put on what envy. Love that you inspired your art style by Tiny Rouges. I think you should explore it more, very very good job!
Thanks! Some info on the boss: he has base hp of 30k, and by the time he first spawns it increments to ~50k hp, so basically a DPS check. You would want to prep a single target DPS tower to beat him.