Step 1 : Make a big hole Step. 2 : get a Tank Omnidroid. Step 3 : Don't stop spawning them until the toy box. is full Step 4: put your difficulty to extreme. Step 5: get a recognizer (red and black ship). Step 6: start shooting at the Tank Omnidroids! And thats how to level up fast and get a lot of blue sparks. :)