Finally beat this game and 1000000% this game needs customisable controls if there is not assist mode. Doubt the game will be updated for changes but yeah.
For newer players you 100% need to find all ghosts to beat the game. There is a secret room (can't remember where) but believe it is above where the mummy character is located in the roof.
The count down sequence is impossible without knowing where all the npcs CHANGED locations are. Find them within 7 minutes and then go to the checkpoint where Death's old games are closest too. This is the location of one of the characters and you need to get triple jump to easily clear this section in the 7 minute timer.
Make sure if you cannot clear all the npcs in time then you quickly reach the check point near the location where death's old games are located at since this is by far the hardest npc to rescue.
Look at online tutorials if it gets too hard.