It comes as an experience rather than everything in a week. Took a little while to make my platformers feel nice, but the good thing is that I kinda have this template that's ready for any future projects that I make, my game as an example already had its top down movement and bullet pattern system prepared before the jam, so that made me time to dedicate on other aspects of the game, just polishing in general. So, don't worry about it now, with time you'll learn and implement new quality of life things and eventually all of your subsequent games are going to feel like butter. ;)