Dyna blaster

Type "HUDSONSOFT" at the title screen, and you can now only die at the bosses in the game.
Level codes:
1-1 MAVWJQPC
1-2 MAFWJQCC
1-3 RAKRJGPC
1-4 RARHJGPN
1-5 MKZAOLAH
1-6 RAFHPBPN
1-7 UAOKLSEU
1-8 MKZAOWRV

2-1 UCBZVPEU
2-2 UAGKTVEN
2-3 UAGKTVEN
2-4 UCCZTEEE
2-5 UBZZVOST
2-6 MACEBHLC
2-7 UBHZVEST
2-8 RAYHMSPP

3-1 UAKKOVRA
3-2 RANYJHZP
3-3 UAVVIVRU
3-4 UANVGEEN
3-5 RAHNQHZC
3-6 RAANQHZN
3-7 RAANQWZP
3-8 RAYATWPN

4-1 MCHNQQGP
4-2 RUNAWMPS
4-3 MCNNQQKC
4-4 MAVCQPRT
4-5 MCANQJKC
4-6 RAFAVONS
4-7 UCAHQGTA
4-8 MAKCGQEZ

5-1 MAKCWVZP
5-2 MUFCWEP
5-3 UAVVOHTU
5-4 UKZHHPAK
5-5 UUKVJPTA
5-6 RAANPTES
5-7 MCNNWPYT
5-8 UUKVHOTZ

6-1 MOANPSYC
6-2 UWGKQMRK
6-3 UOHHWSTA
6-4 MKLNPIPY
6-5 MWWEIWNK
6-6 MACEINHN
6-7 UCNZQLKU
6-8 MCZAILRZ

7-1 UCLZITKU
7-2 MACESGHT
7-3 RAGYVNZV
7-4 MBAASWPA
7-5 UUFKPQGA
7-6 MKNATQPA
7-7 MABEWWKN
7-8 MXEEVPPL

8-1 UOZOWEHU
8-2 MXAEPMYH
8-3 UWOFVJGZ
8-4 ROKFLWZN
8-5 UAFFVWRU
8-6 MCKAIELC
8-7 UAVBQWRU
8-8 RUOOOWZN