I played the game out (or watched it I suppose lol) and I really love the concept of it. I made a few notes so I'll just copy and paste on here

- Love that upgrades continue with you in a new game after you win.

- The different biomes are really cool and seem to be random.

- I like how each class is easy to tell with the symbols on their shield.

- Each class brought something unique and strong to the game which was great.

- Wish I could see the stats that would increase when you mouse over an upgrade.

- You don't seem to get a lot of exp, you get 2 bars full by the time you reach the boss.. In one second run it seems to give me about 3 or 4 but I also got a few chests too.

- With the shield and heal cooldown being so low it would be nice to have the base power increased.

- There was a bug where the boss flew across the screen, not sure what triggered that, had to start over cause the boss wouldn't return.

cute game. Love the art style and uniqueness of the characters (animations and support setup). The game works great as a mechanic. Almost wish that the feedback for upgrading weapons, new types of enemies, and some sort of progression was also available to keep playing for hours.