It’s called „Balance Man”. Basically a clone of Mario Bros with a cartoon Murazor as the player. Expected a lot more from WG this year…
To cite SpeedyCraft51:
„You have to forgive them really.
I understand that they didn’t have the time to create a proper April Fools gamemode this year, with all the premium tanks to create and pay2win features to add. You can’t blame them, it’s just too much to do at once.”