Thank you for your feedback! Well in this room you must go up right there is a room there to continue (you can see on the map that there is a connection, hit pause button and go to the map to see the full game's map), and on that section you will obtain the MISSLE ammo (X blocks destroy ability) after crossing the some platforms challenges of course), and get back to this room to destroy those block!
and for the limit bomb condition: it is because if you have infinite bombs you can actually fly by facing the gun down and shot and trigger at the same time.