The lost tribes (or whatever is the exact name of the beach map) is way too hard compared to the previous one

I finished first map, and tbh while 3 heroes is neat addition to genre and create some tactical depth, game feels a bit empty. 1) All upgrades through run are which hero main ability to improve, nothings more. No way to choose that ability among many or choose 2 or more abilities or some general stats like speed hp etc. 2) No ponits of interest on map. 3) No difficulty, only maps progression. 4) Typical metaprogession with hp, cd, speed etc. So, I kinda want to know, will it became better? Because you kno...

can I upload game play before the release date ? also is the music stream safe ?