I spent about 10 mins playing this game before I was lagged really bad in the water exploration screen.
Honestly, this whole game seems like a big train-wreck. It seems that nothing is in that much of an order, and some of the levels just seem really long and have nothing good to do in them, except walk left, right and maybe jump. There seems to be no challenge involved, but maybe I didn't get that far.
Some of the tile sets look nice, but this seems far from an enjoyable game. Everything just seems placed there, and has no good level design.
I don't wanna offend you, but this really isn't that good of a game. I want to see somewhat of a challenge within the start of the game, even if it isn't that hard. It is quite a boring game to start, and not many people will want to continue on.
In a nutshell, the game is all over, and needs some kind of sense of what it wants to be. I know it is a prototype, but I will come back and visit it when it has more to offer, and in a higher completion stage.
Sorry if I offended you, I am just giving back my criticism to try to make this a better game, because I can see that you have possible potential to make something good.
-Wolfy