If possible u could put in the game: a) store ( here u can buy weapons, armors, rings, necklaces, etc.); b) tree skills (each lvl gives to u 2 or 3 skills points and the game needs more skills); c) race class (human, dwarf, elf, dark elf, orc, etc.); d) specialization (warrior, mage, archer, thief, etc.); e) group/party (3 or 4 members to play together);f) position of the members (we can put tanker/warrior in the first place to take main damage)...
 "Idle Quest"){kind=icon}
 "Ragnarok Idle"){kind=icon}
 "IdleVenture"){kind=icon}
It would be better to make new game from scratch than update this one. You want a lot to be done right here.