Thanks for playing!
For number 1 and 2, it's just me and my artist, adding too much is extremely time consuming, so we settled like this, we might make more later, but not for a while if we do.
Level indicator is a great idea. I will find a way to do it.
Tooltips are going in with the next build, that should cover your fourth question.
The public and patreon games are exactly the same, except the patreon build has full access to the character creator. Chests are placeholder and not interact-able.