We chatted on stream about my thoughts, but I'll post what I remember here so you've got it written down!
Generally love the style of gameplay, and the high score chasing feels great. Getting those big combos is 👌
Broadly, I don't think I'd have had as much fun if you weren't there talking about the design. I assumed the aim was to make myself as big as possible, and got a little frustrated by the slow movement speed when I was big. I hadn't really grokked that there was a tradeoff between being big and being small, and that a lot of my actions could make me smaller and more nimble. I like that in theory, but I think some warmup "levels" where you really make that clear to the player would be useful.
Once I did understand that, though, boy did I get going. I've revisited it a couple of times since playing on stream, and I can't express how much I love the feeling of eating 10 slimes that I've carefully positioned into a big row, using all the mechanics I have available for changing size/speed/etc. I think that works really well, and if you were to revisit it, you should push that mechanic far more. Tell the player, make sure they're doing that right from the beginning. Maybe after 20-30 seconds of gameplay to get used to the controls, you might always spawn a bunch in a row, so the player gets that satisfaction early? I feel like that's the "core" fun of the game tbh, it's awesome.
It's also important to note that I never paid attention to my health 🙃 not even a little bit. Often when I died I thought "argh, my health must've been low but I had no idea". I usually like to put the health somewhere near the player themselves, because that's where they are focusing their attention. One to think about for future jams!
Overall this is great, and I just hope enough people figured out that being small is also desirable, so they engage with all of the mechanics that are there.