I've kickstarted this game the very second I saw it and I was not let down.
This game really brings back the memories of how games were when you and I was only children.
The nostalgic "8/16 bit" look makes you think of the old NES/SNES and MSDOS days when you sat up hours straight because you could not save or you just could not stop (just one more level). This has all that and more. Remember the annoying sounds and music that some games had due to the very primitive soundboard. Well forget about that with Shovelknight because the music is just beyond awesome. Everything about it screams well done, and there is also a person in the very first town that you can talk to if you want to change the music in case you find it repeatative. Just gather more notepages and he can play more songs.
This game is filled with hidden treasure, fun jokes, awesome characters (a horse in a dress!), lovely artwork, great enemies and very well done boss fights.
The game is like a combination of Duck Tales, Super Mario, Mega Man, Faxanadu and many more epic titles + more. If you are looking for anything to tickle the old nostalgic nerve this is the game for you. Even thou I have tried words can't describe how awesome this game is. Try it for yourself. You won't regret it.
TL;DR 10/10 this game is awesome go buy it!