Level 1-9 will queue together
Level 10-15 will queue together
Level 20-30 will queue together
Level 40-75 will queue together
Idk about alts
Maybe the hive can make an anticheat that will ban anyone that is beyond the level of the specified level based matchmaking game.
(e.g if like a level 1 is like just comboing the whole game then thats obviously an alt so maybe like you can ban them from the hive for 24 hours so they cant play on their alt)
This might be added, bit it has been stated that a sysytem like this would be very complicated and high level players can easily make alt accounts and queue into low level players lobby