Thank you for playing my game!
Actually, You don't start the game from scratch If you miss the deadline. Instead, you will be spawned in a new world but apart from the castle. All the collected crystals are preserved :D
Unfortunately, I don't have enough time to create a proper introduction and some ideas weren't completed. For instance, edges of the cube were supposed to be a pictures of spells or worlds to be more meaningful for the end user :)
Speaking about powers, I agree with you. probably, it would be better to spawn powers along the level and you can pick them up :)