Please find below a video showing some of the more efficient strategies in order to achieve the times required for each level. Some of the levels will require more patience and persistence than others, however the times really are not too bad, they are a real case of trial and error until you have that final smooth run. A useful tip that I found helped me was to try to forget about the times as they can become a distraction especially if you find yourself checking the time out part way through a level. Try to focus on when new enemies appear and where they appear from instead.
01KICK.lvl (0:12) - Time Required: 7.00s
02ALLEY.lvl (0:26) - Time Required: 10.00s
03CORRID.lvl (0:45) - Time Required: 10.00s
04DROP.lvl (0:59) - Time Required: 19.00s
05SUBWAY.lvl (1:31) - Time Required: 23.00s
06JUMP.lvl (2:04) - Time Required: 25.00s
07SHOTS.lvl (2:37) - Time Required: 26.00s
09FIGHTC.lvl (3:08) - Time Required: 19.00s
10DESPER.lvl (3:34) - Time Required: 30.00s
11BREAK.lvl (4:12) - Time Required: 28.00s
13TIRALL.lvl (4:52) - Time Required: 14.00s
14SERV.lvl (5:25)- Time Required: 25.00s
15HOSPIT.lvl (5:58) - Time Required: 47.00s
16DONUT.lvl (6:57) - Time Required: 40.00s
19OLDBOY.lvl (7:48) - Time Required: 30.00s
17ELEVAT.lvl (8:24) - Time Required: 18.00s
20BALLRO.lvl (8:51) - Time Required: 30.00s
21MEETIN.lvl (9:25) - Time Required: 54.00s
25FALL.lvl (10:31) - Time Required: 25.00s
26STAIR.lvl (11:08) - Time Required: 38.00s
27OFFICE.lvl (11:50) - Time Required: 40.00s
28STATION.lvl (12:39) - Time Required: 28.00s
29TRAIN.lvl (13:15) - Time Required: 25.00s
30GATE.lvl (13:46) - Time Required: 33.00s
31LOBBY.lvl (14:22) - Time Required: 33.00s