The furthest I got on the PSP version of Gradius Collection Gradius IV was Loop 3 Stage 4, but under Easiest difficulty and loading many times from the last checkpoint point. I feel like loop 2 onwards where the enemies release pebbles when destroyed had got me to change my playstyle. Whereas I can dish out the carnage on loop 1, I had to avoid destroying them loop 2 onwards.
Never got to play loop 2 onwards due to having the Gradius Collection for PSP. Whenever the credits finish, it takes me to the scoreboard. Watched through the entire run, I can’t imagine myself handling loop 2 without loading to a previous point.