1) You can infinite slide if you walk or dash in a direction and then hold down the duck button. Don't know if that is intentional or not.
2) If you duck and press "/" you are stuck ducking until you hit the duck button again.
3) What is the purpose of the "/" button as it seems more of a chat feature which dosent make much sense as its not multiplayer yet.
4) If you pick up the dagger at the starting room then start, it gives you the revolver.
Btw I LOVE the game, it reminds me of Enter The Gungeon with the art style. The gameplay mechanics are awesome and I really look forward to the full release. Keep it up :D