Has potential, but lacks anti-frustration
As some before me already said: It would be a great game, but the fact, that you already have to retry the level on failing at what should be the most basic things, makes it difficult to love. Just being a bit clumsy with the dynamites (e.g. accidentally pressing space and the other ones around it blow up), and having neither a saving point nor re-appearing dynamites, forces you to press escape and choose "Level select". At least a retry button would be convenient. And maybe picking up the dynamite solely with space is more intuitive. Why the down-key anyway? It's just irritating (and to me the reason I accidentaly dropped the dynamite).
Another point is that the spikes seem pretty unobstrusive. They have the same size as the stones, which are just decoration. Even the warning didn't help. Were the spikes that thing on the ceiling or those little bushes at the floor? Had to try it out, ouch.
I didn't reach much farther, since the dynamites at that point then just weren't enough to get through, and I couldn't even go back (a long way, btw.) to get the remaining ones.
All in all, this would be a great entertainment, but the fact, that I had to restart the *whole* level over and over again, is just frustrating. Maybe you should let someone beta-test it beforehand. And better don't ask your parents.