This is the hardest level you can possibly imagine... good luck!
257,259,108,493,0,221,260,40,40,0,182,157,40,180,21,208,303,0,20,362,211,180,20,253,173,60,8,297,330,40,13,127,385,50,70,7,126,437,0,0,67,455,110,40,0,67,156,60,300,24,165,175,40,6,144,310,90,6,144,208,90,6,164,270,-90,5,183,157,14,67,116,59.85,40,27,86,175,0,0,67,-274,60,390,0,117,494,60,40,34,504,148,35,249,230,36,371,94,1,0,0
How to prevent the forever drilling glitch: When you get the drill, reduce the alien plant's health to 1. Now wait until the drill stops moving, THEN kill the alien plant. You will not get a repetitive killing sequence anymore. Hope this helps.