This game is pretty tough to run, it's very easy to mess up in quite a lot of spots. And pretty often, because of uneven ground, the character simply doesn't want to jump which is very annoying. The game consists of 1 world which contains 6 levels, which I shall seperately comment about.

Level 1:
At the place with the 3 spiders on the bottom (After the volcano kind of hill) it's possible to bounce onto the highest platform (I bounce on the lowest platform) but this is very random and I think it also has something to do with the running distance towards the upgoing hill of the volcano. Usually I kept restarting until it worked but sometimes I was getting tired of it and kept going if I bounced on the lowest platform. With the trick you could save like 1/1.5 second.

The next tricky spot is right after the previous spot. I run up the loop, but just before I fly off of it, I release the right arrow key so that I fall off the loop but not too far off (If you hold the right arrow key pressed, the character basically boosts off the loop) and I can turn around and jump onto the loop. It's a little bit quicker than using the next loop. This is also one of the spots where the character very easily will NOT jump and then he just falls down... Or sometimes when you jump, he can't make it onto the loop. Needed to be done quite precisely.

The next tricky thing is right after the previous spot again. I jump through the ground a bit and then the character starts to bounce and gets pushed through the ground. Here it also happens quite often that you jump a bit wrongly and the character will bounce down. Another thing to note here is when I've been bounced through the ground, I run up the hill, jump, and go a bit more to the left so that the enemy won't shoot just yet when I would land on the ground next to him, and because of that I can run a bit there and jump over him and fall towards the door. If you would run up the hill, jump and immediately go to the right, he'll shoot already and you either get hit or need to slow down and also include an additional jump (Or bounce on and off the enemy). In other words, that would be slower.

Level 2:
This level is very straightforward. The only thing that sometimes went bad, was that I jumped too fast to get on the third moving block to get to the trampoline. As you can see in the run, this time it was done pretty much perfect :)

Level 3:
The jump off the loop onto the trampoline in the beginning could be done a bit better, since I've got some flying going on in the run. But you need to jump off the loop at a very exact point to immediately jump onto the trampoline.

Just before the spider, it's possible to immediately jump on the second platform part, and then you could get the boost from the spider a bit sooner. Once again you would need to jump at an exact spot with the right speed.

Level 4:
Just for kicks I jump over the first moving platform :) I say "Just for kicks" because it doesn't matter too much since the other 2 moving platforms are already moving when the level starts, so I need to wait a bit anyway. Maybe it would be possible to do this level in one continuous run and jumping motion, but that's damn difficult to perform because of the middle part (And the characters' jumping inability on the platforms...).

Level 5:
It should be prevented to bounce off the second spider in this level. I should have a run going on on the middle grey block and then jump over the spider.

I also jumped too soon towards the trampoline, and so I didn't make it, causing me to use an extra jump.

Level 6:
The boss fight, a VERY angry penguin. The first 2 boss hits could've been a "tiny" bit faster but they were pretty solid, the third hit was like optimal :)