As the name suggests, this is possible only on the web version. Note: This method relies on Road Spikes a lot. Don't be stingy about them, but don't waste them either. 1. * From rounds 1-10, get a 3-0 Tack Shooter on the first curve of the track. 2. * From rounds 11-20, replace the 3-0 Tack Shooter and do the same as Step 1. 3. * From rounds 21-30, replace the Tack Sprayer with a Ring of Fire and use Road Spikes/Spike Factory to clean up bloons that get past. Lead and Zebra Bloons might only leave behind Red Bloons. 4. * From rounds 31-40, repeat Step 3. You may buy range upgrades for the Ring of Fire. All children from Rainbow Bloons should be clusters of Red and/or Blue Bloons if 4-2. For round 40, spam Road Spikes to pop Ceramics and the clusters of Red and Blue. 5.