We appreciate you playing our game! I do agree, the sacred orbs could be more powerful or at least more frequent, and the HP regeneration is a bug we found late in the game, certainly something to fix on a future update.
Also don't really have a sequel planned in the recent future but those are definitely some good ideas we could implement.
The absortion passive makes it easier to pick up EXP from longer distances.
If you'd like a game similar to this i recommend checking out Vampire Survivors, we took a lot of ideas from that game as well.
Thank you for the kind words and the valid criticism, and thank you for hosting this game jam, it was certainly a nice challenge for us.