The stage of Jewel man is one of the mildly difficult stages of the game, it can be won but it can take a while. This one starts by going down the ledges to the next scene. Kill the Mets and continue . A new enemy will appear during the transition; It will look like a green flat line, but as soon as it hits the ground it will grow spikes and the spikes will follow you, there is another new enemy who always hides in mine carts or other unexpected places.
Once you reach the next scene, there are some spiders crawling that need to be put to rest, but don’t waste time on all of spiders just kill the ones that block your path.
Continue your path until you reach a series of platforms, you have to be really careful with the platforms as they will have spikes covering the ceiling and ground, try to be gentle with the jumps because a slight miscalculation will cause your demise. Once you finish with the platforms you will face a sub-boss. The boss is really easy to beat, beware that he will jump down from the ceiling and then a boulder will fall down as well and if you are touching the ground the boulder will stun you for a couple of seconds. While in the air start shooting him. Pay attention because after a few shots the boss will start rolling trough the room, even the ceiling; watch the ceiling, because where the pebbles drop will indicate where he will drop down. Repeat the process and after a few minutes he will be dead.
As soon you finish with the sub boss you will face some enemies on the next scene, they are like flowers and they will open up for a moment so you can shoot the center. Continue to other side of the room and be careful with the mine carts, after you destroy the carts go carefully to the pit you see an as you did in the first level, dodge it and kill him; this same process will be repeated for a couple of times before going to the next scene. When you finish with the pits a familiar scene will be repeated, the balancing between platforms.
Jewel Man is extremely annoying, he will jump the same time you do. One strategy that works with this boss is the use of the Black Hole Bomb, because by using it will remove the enemy’s shield and it will be the only chance to shoot at him.