There are 4 enemies called runners
under 1000p - blue runners
speed: slow
+5 bonus
above 1000p and under 2000p - violet runners
speed: normal
+10 bonus
above 2000p and under 3000p - violet dot runners
speed: faster
+15 bonus
above 3000p and under 10000p - black red dot runners
speed: crazy
+20 bonus