Very fun game
I love how if you miss a jump and go to a different place on the level. So basically there's different routes for beating the game. I love it!
Here's another tip if you want to beat the game quicker - Don't waste your time killing enemies. You can just avoid them and be on your merry way. But it does take the fun out of having a gun. The only time you really need your gun is when you're on the mine carts and at the last part when you're trying to kill the eye. Well I hope that helped.