Yet-another-long-and-boring-repetitive-generic-autoscroller-shmup alias...
Zombie Nation's japan version Abarenbou Tengu. There's 8 rounds, 1 autoscroller scene with deadly traps and "shoot level to make a path for yourself" stuff and 1 boss who takes ~20 hits which can be done by holding the right button and holding the fire button. Except the final
boss battle which consists 4 snakes.
This movie uses a cheat code (25 reset and a button combinations) to check final boss lagginess. Other parts of the game could be done without having a lag frame, unsure about places where you need to shoot the path for yourself (and there are many sprites occasionally so you need to shoot).
0x418~0x41B for HP addresses.
11 HP / snake, they move depending on the player's position, player moves like skating with normal shoes.