Nice adventure game! A few things bugged me: The controls being the main one. When moving, I can't use two keys at once, per example if I'm moving forward then realize I want to go down as well, the down key does not work. I have to let go of forward then go down! Also, the spikes should have a little extra display of when they come up, maybe a small charge up animation?
All in all, great job! You should be proud!