Around 1 hour 16 minutes to beat. Good NES style game.
In this playthrough I show all incidences where I used the Stage Select feature, which is the only way to continue in the game. When the Stage Select screen is shown it means I beat that stage on a fresh set of lives. If its not shown it means I beat multiple stages in a row without exhausting all lives. Whenever I used the Stage Select it means I failed the stage with whatever remaining lives I had when I got there. I show the deaths in my successful stage runs, so you can see where the checkpoints are. If all lives are exhausted you go back out to the title menu and can access the Stage Select to re-visit stages you already got to. Stages need to be unlocked by getting to them.