Hopefully these things are fixed now:
(if not scream at me and I will try to do better next time :p)
- Increased size of weak points on teleporting enemies (now they can actually be hit!)
- Ending achievement should now be given to you when you complete the game
- Fixed the bug with the missing life sacrifice card in story levels
- Changed / reworked Twin Skull boss behavior
- Your save game is no longer deleted after beating the game (sorry for including this in the first place qwq)
- Added "End Run" button into the ESC menu
- Shotgun pickup in intro can not be abandoned