Here is the guide I use for my route

Level # Significance

2.  	Pick Up Steel Blade (Obtain 'save that dude' Achievement)
   

3.  	Pick Up Fire mage Vest and Jump man Suit
   

4.  	Pick Up & Equip Hero's Suit (Obtain "Class Consciousness" Achievement)
    	After level 6 and before level 7 go to Prize Room and collect the above achievements
    	After level 7 you will be automatically sent to the shop, in the shop use the gold collected from the Prize Room to purchase and equip Poisoned Dagger.
   

5.  	If tight on gold, you can pick up noble sword worth 911 gold
   

6. 	By the end of this level you need to have 2,000 gold
   	After 13 you will be automatically sent to the shop, in there purchase a silver key
   

7. 	Use the silver key to pick up and equip Supersonic Ring
   

8. 	You need to collect all 3 gems in this level
   	After 18, go to the shop and purchase a golden key
   

9. 	Use the golden key to skip this level's cut scene
   

10. 	Use spider skip to skip this boss fight.
    	Then go to the bank and pick up, Gayan, Improved Jump Man Suit, + other equip
    

11. 	Cutscene skip
    

Here are the splits I use for the run

Name Levels

Intro 1-3 Dagger 4-7 Skull 8-10 Ring 11-16 Gems 17-18 Skips 19-20 Forest 21-27 Castle 28-30

The Reason why the last ten levels are so simple is due to the bank removing all need to manage items, simply making it a mad-dash to finish each level as soon as possible.