Whitevale Defender, retro tower defense on Steam

Steam page:

https://store.steampowered.com/app/841320/Whitevale_Defender/

The war machines are approaching. Help King Theodore save the city of Whitevale from the evil King Balmek. Place your defenses perfectly along multiple criss crossing paths to prevent the war machines from reaching your Castle in this retro strategy defense game.

A classic tower defense game that is simple to learn but challenging. It's a game you can keep playing to unlock new towers and tools that will get you closer to the boss each play through. The game gives you a small amount of money each wave, but to beat the game you will need manage your money flow. There are several nuances to the strategy for you to uncover as you play. If you love classic tower defenses or strategy games in general, this game is for you.

I'm enjoying the look of this!

A cool visual style; makes me wonder at the same time if e.g. the enemies are discernably different enough to identify them?

Does it all take place on the same map? How much playtime does offer?

The music is a bit droning, i wish it were a bit more dynamic and create some excitement!