For some reason, even if you haven’t unlocked Flavio yet, the entrance is still visible for a split second upon entering the village
Cossack hub is known for having glitchy walls where you can OoB. TheCrypticJacknife uploaded this YouTube video in 2011-01-26 demonstrating an OoB near Glider. There is an unusual OoB by Larry’s tree (video) where you can get stuck in a hole underground, and it’s difficult to get out.
This ledge can be used to stomp directly up to the Snowball / Glider area. On PS1 (geometry) it is a little tricky to do < is it? >, but on PC (geometry) it is quite easy due to the change in Quad triangulation
The snowman minigame items do not spawn until you talk to the Gobbo. If you die during the collectathon, your progress is reset and you have to talk to the Gobbo again to re-spawn the items. This happens even if you collect all the items, but haven’t talked to the Gobbo to collect the 100 Crystals yet. (so shenanigans like in Caveman Hub don’t seem possible)