Hi. Actually, you are right next to the stage with Rusti so good luck. The final stage is hard at first, but once you get the pattern of jumping it is very easy. If an electric barrier is close to a spike, you just jump both of them at once while if you cannot hear both of them so well, then you first jump the barrier or the spike. Delete rays luckily do not really cause huge damage so you do not need to worry about them that much. What I do on that level is first go to the right to clear all the enemies there. You will get to a beeping barrier you cannot jump over. Die on it which will return you back to the beginning, but with enemies on the right cleared. Now go to the left until you reach 0, at which point you will start the fire which will clear that beeping barrier and you will be able to go to the right and complete the level. Note that near the end of it the fire will go crazy so be prepared to keep jumping quickly to the right and then prepare for the ultimate boss.