I just finished playing the game and sadly have to say - dude, slow down your horses!
From the beginning I wasn't sure what to expect, but since I know development took only weeks it didn't look too good. I wasn't disappointed per se because - sorry to say - I wasn't expecting anything amazing...
I think you have big potential, you know your stuff, but Keen is a game focusing on details, colours, map layout... Fifty shades of blue is possible to maintain, but it needs way more careful color picking.
Right as I started playing, I noticed another problem. Slowing down original music and making it WAY louder is not a good choice... My head started to hurt after only a few minutes because it just doesn't feel right.
Next - you didn't understand many of the structures - floating buttons, walls in the middle of the forest etc. The Volte-face being replaced by goplats?
There are so many easily obtainable 1UPs and sugar bags it destroys the point of getting them. It strips the gameplay of all competition, you have no desire to work for that single sugar bag that is so tricky to get to if you have ton of others. Also number of the pickups is ridiculous. At the ninja fort I had almost 500 shots - that is WAY too much.
What I also didn't like is how linear this is. You have no control over the order in which you can play the levels. In the game you very often arrive to a door and a single way to the key.
At the first couple of levels I thought that there is no detours at all, but then Ninja Fort arrived with its mandatory detour which was SO INCREDIBLY LONG that it almost made me quit the game alltogether. When I got to the pack of doors and found out that red gem was missing, I just F10+E-d out of the level because I am not going to spend another ten minutes walking through the empty halls.
The last level I am not going to talk about, just no.
I hope I am not looking too much like a jerk now, I sure didn't want to, but this is clearly quantity over quality. It isn't a race, take your time with the development. Many mods have years of development into them. Just look at Ceilick's The Universe Is Toast trilogy. Episode 7 wasn't percieved too good either, many people didn't like many of the aspects. And then Ceilick made episode 9 which is considered one of the best mods. And revised the Krodacia once again making it better. Keep going, I am sure you'll sort everything out and make yourself part of the modding legends