Beat the game with a continue, then again (both on hard) with 1.5M points. Then grinded the start of level 5 for the 10k kills, killing my character to force end the run because it doesn't save otherwise until the end of the level.
Game completed at 100%. I was missing like three items when I finished the last level. Luckily they were 2 CDs hidden in the most recondit places possibles of the last levels, and one hat similarly hidden there.
Beat the game on normal, then arcade and with its TLB all in one credit. Thanks, Fire Arrow X ship. (2h 12m) ----------------------------------------------- Grinded the rest of the achievements.
Got a Desperate (hardest difficulty) clear. The game has no continues. It also crashed before I could save the replay. (2h 16m) ------------------------- Cleared the extra on first try then did again a Lunatic 1CC without a crash.