(I'll leave a TLDR at the end)
Amazing game, love the demo of it. There are many things I find really enjoyable and amazing! The colors and sounds just fit so much to the simple style.
I love the popping sound when the towers actually shoot the enemies and the explosion sounds of the Explosive Grunts, it just works.
I do have some minor things I am not too much of a fan of, mostly included the fact there is not really an "afk" way to do it, kinda like auto starting of next waves (Made sense in my mind, since auto tower upgrading is already an upgrade).
There is also the fact you "constantly" have to move your mouse to collect the coins the enemies drop, which I feel also could be an upgrade maybe (Was also commented by another person).
The one that annoys me the most, which I also referred to earlier, is the 'Auto Leveling' upgrade. Sometimes it is extremely annoying that it auto levels up your towers, especially if you want to focus on getting another tower down that is a bit more expensive. Cause guess what, that aint happening until you have all your towers upgraded so they are more expensive than the next tower placement... It also kinda goes hand in hand with the 'Coin Converter' upgrade, that converts your coins into tokens, which you would end up getting less of, even if you know you can beat a level with less upgraded towers... (Probably just more on my side, since I like replaying levels to earn a bit more before heading to the next one) <- (Noticed this one ain't too much of an issue, since you earn more on the next level anyway, but could still be nice to have).
Otherwise amazing concept and great design, a little tweaks here and there and it could turn into something really amazing!
--- TLDR: ---
- Maybe an auto 'Coin Collection' upgrade. (annoying to keep moving the mouse around).
- Toggleable 'Auto Upgrading/level' ability. (Kinda sucks going for another tower and losing money to an upgrade, when you get bombarded with enemies next wave).
- Auto start next wave as a feature. (Maybe even as an upgrade, or a setting in options).
Hope to see more of the game! Already have it wishlisted on steam! Good luck with the progress!