This was a delightful playthrough, excellent job!! The art style is stunning and captures 80s exercise video perfectly. The character models are great and each boss has a distinct personality with captivating introductions/dialogues. I especially loved hydration man and his surfing backflip on the exercise bike. The different spinning border things in containing your player sphere thing were a nice touch and added to the individuality of each boss nicely. The writing is solid and does a good job of being silly/satirical without stepping into cringe territory. I laughed a handful of times. The intro cutscene is fun and introduces the player's scenario without overstaying it's welcome, nice job.
I found the gameplay itself a bit frustrating for a few reasons. The biggest one was the lack of visual contrast between the player, the bullets, and the environment. It can be quite difficult to follow all moving objects on screen at certain points. I also wish the bullets had a consistent style throughout the levels; sometimes they are outlined, sometimes they are brightly colored, sometimes they are spheres in the same shape as the health powerups. It makes for a confusing experience at times, and a more consistent bullet scheme (e.g. always outlined, always a certain color scheme, etc) across each level would help imo. There were some other gameplay bugs as well, such as glitching out of the player boundary on the second level. I really appreciate the auto-scroll feature, and likely would have stopped playing during the second boss without it. That being said I had a great time playing through this game and really enjoyed some of the humourous moments, the NL animations in the title screen and the easter egg bosses in the last level are some standouts.
Overall, this is a beautiful entry with lots of fun moments and a super cool take on the theme, that maybe could have benefited from more visual clarity and some fine tuning of the gameplay. Awesome entry!!