ah i see, yes its a learning process. im really impressed actually, that you did all this and its only your first jam.
some common solutions to the lack of information problem include:
-showing the key you need to press on screen when it is applicable in context. in this case, you would show "C" when you have rhino head and are next to a green box
-making less button presses necessary. for example, instead of pressing "C", you could make the rhino head automatically break the green blocks
im looking forward to the updated version!
my twitter is @ShieldGnrtr7