I did consider putting hints for break and jump, but those seemed likely to be discovered through natural play. The up/down on ramps is much less intuitive, which is why I had to include some blatant hints.
The gem above spikes on the first level is meant to lead the player to discover jumping on their own. Things like the breaks, and being able to bounce of enemies is really meant to be discovered gradually as your skill in the game increases.
Thanks for the thoughtful feedback!