First time playing. I had to redo the 4th level since I lost my progress by hitting No when asked to continue accidentally. So I edited in my second run of the 4th level and it was a little cleaner. Other than that this was all reacting in the moment with no prior experience. Great game with no real penalties for death. You start exactly where you died when you lose a continue. The only exception is that bosses regain a little health if you lose a continue on the boss, but its pretty negligible.
This is one of the easier arcade games of the time, for sure. But maybe thats because Im used to Gun.Smoke which I still have yet to complete. I had some no damage runs on my first attempts of some of the bosses. A few others would take some practice to do without damage.