Things I've done in the last 24 hours:
Fixed 100% completion not calculating correctly for some players.
Fixed giant hand in Valley of Elementals sometimes removing itself before creating an entrance to Inside the Beast.
Removed leftover Achievement scripts that lead to early unlocking for the players who played earlier than others when the Achievements update was live. Those scripts were left behind from the time I was going to make 100+ Achievements, but when I learned that I had 100 Achievements limit, instead of copying fresh copy of the game, and starting over, I removed the scripts of the old Achievements (with old IDs) and started re-adding them with new IDs with only 100 Achievements in my mind. Since I used the same method of naming my Achievements (ACHIV1, ACHIV2, ACHIV3, and so on), some new Achievements that weren't supposed to be unlocked, got unlocked because some old scripts were left behind because of my lack of attention. I'm sorry for this, but on the bright side, those Achievements weren't that far ahead in the game, you would unlock them a bit later, also it's probably a good opportunity to have those Achievements to be unlocked earlier, which is kind of rare, makes you one of the first players who played Slayer Mage: My First RPG with Achievements.
Fixed stealth kill Achievement not disabling alerting guards Achievement (you could unlock them in one playthrough if you tried to stealth kill every imperial guard, then alerted them).
I understand that getting 99 level with every character can be frustrating, and also in the end you'll have more gold than you can spend, so I added XP Chest in Minigames location where if you open that chest, you will pay 1,000 gold, but get random XP from 0 to 1,000,000, where both 0 and 1,000,000 rewards have their own unique sound effect. This way you can interact with chest opening minigame and farm XP faster, I would add some Achievements for it if I didn't have Achievement limit of 100. Of course, no one is stopping you from farming XP via other methods; you can play this game however you want, I made this game with that in mind.
Fixed some other minor bugs and typos.
As always, thanks for playing. - Bocchira.