Tbh it felt lazy, like most of it was copied from an existing game without much effort to fit the theme. Even though it was buggy and completely unbalanced, it was still as addictive as all the other games like this, but I judged it a bit harsher than I otherwise would due most of the enjoyment seemingly coming from using preexisting assets, and a resulting game that is virtually identical to games I've previously played. My disappointment mostly stems from wanting to see more originality from experienced devs. But I'm sure my opinion will balance out with all the people who will undoubtedly rate it as they see it.
One of the most weird things to me was that many of the upgrades had no point to them. The only things that mattered were dmg, money gain, cd reduction, specials and maybe range.