Oh thank you so much! I'm so glad you enjoyed it.
And you're definitely right; even during testing the ability to 'continue' after death if you'd already beaten a stage was brought up, but I just wasn't sure how to implement it so just kinda hoped the 'level select' screen would be enough since you can always press the next level there, but it's not an ideal solution.
I should probably just have migrated the continue and retry buttons from the victory screen and hide the continue button if the level has yet to be completed in the save data and always default to retry even when both appear
Thank you for your kind words and feedback :)