It's a good prototype and quite addicting,there's some really broken interactions, but not in a bad way.

The game is a tower defense/shoot em up where you destroy balls that spawn, every 5 stages there's a boss and you unlock different balls that have each their own caracteristic.

The major con of this game is that it's away too short, when you start to enjoy the game, it's already the "end", since there's only 10 stages and on 11 onwards it just repeats itself. Another con is that the bosses dont spawn more money according to the stage, so the boss on 5 or 10 will drop the exact same as the boss on 55 or 60, that is also related to exp from all enemies.

Some cool broken things are that the auto aim is quite OP making the game a idle experience with some fun to it, and you can disable it anytime if you so want. The fire rate is also really overpowered, and when tied to the splash damage, splash area and other damage modifiers you can easily clear any area of any level going 90+ is not a dream, specially when the splash hits the whole screen.

Another cool thing is the spawn rate making it 0s allows you to change levels manually and easily farm exp (not that this matter since there's only 10 or so levels) and gold.

A few things i would like to see in a full game is a exp/gold reward for beating a level so it feel more rewarding and not needing to farm lower levels, ability to lock and farm lower levels if someone so does want. Boss rewards relative to stage, not to mention many more balls, bosses and field size as you progress to higher stages (to somewhat increase the difficulty), maybe some special buffs to balls like shield, slow immunity, splash immunity and so on on higher stages.