I tried the FOAMSTARS Live Open Beta Party and here's what I thought of it
(It's just the demo)

#Foamstars

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Music Used:
Multiple Songs from Foamstars that I don't think have official names yet: BGM1, BGM2, BGM3, BGM4, Tutorial
Big Betrayal - Splatoon 3 OST
Anarchy Rainbow - Splatoon 3 OST
One Winged Angel (Final Fantasy VII) - Distant Worlds
Endolphin Surge - Splatoon 2 OST

Chapters:
0:00 Introduction ~ A Splatoon Rip-Off? In This Economy?
1:55 What Even Is Foamstars?
3:31 Likes ~ The Character Design & The Vibes
5:08 Likes ~ The Game Modes
7:51 Dislikes ~ The Colors
8:19 Dislikes ~ Lack of Conveyance
9:49 Dislikes ~ The Controls
10:42 Dislikes ~ Square Enix
12:22 Overall Thoughts
12:58 Closing