A big step down from the first game (I never played the DLC to it though so not counting that)
In the first game everything you did felt rewarding because there were so many upgrades to buy and it helped to give a major sense of progression as you could see how you've been improving so tangibly. In this one most of the collectibles you find are just for the sake of finding collectibles. The whole point of these games is to try and 100% them because of how much content is everywhere but while the first one had mechanics finely tuned so you could 100% it without a guide and without pulling out your hair, with this one I got bored and looked at a guide and decided it wasn't worth the effort.
This kind of collect-a-thon metroidvania is a genre I would normally hate to play because at the end of it I wouldn't feel good about having played it even if I was getting dopamine throughout. Just like how I had to quit playing idle games because I didn't feel good about spending my time on them when I wasn't actively in the middle of playing them, I am going to quit with the Supraland series and similar titles because of this game not making me feel good about having played it.
HOWEVER
Also like how I am with idle games, there are some exceptions where I feel good about having played them ("Universal Paperclips" and "Armoury and the Machine"). With this collect-a-thon metroidvania genre that you "really haven't played until you 100% it" that I don't feel good about, the first Supraland game actually did feel good to have played and I'd recommend people that think they might like it to try it.

This sequel however, not worth it.

With Supraland and this game, beating the main story is only about half the playtime. Supraland was worth doubling my playtime after I beat the main story to 100%. This game I only put about 3 more hours in after beating the main story and decided it wasn't worth putting in any more time because there was so little extra content after the main story that felt fun (yes I know about the not-very-secret area and did some of it).

I'm kind of rambling but tl;dr:
Avoid this game, first one was much better

I played Supraland the OG with considerable help from a walkthrough. I was determined to do Six Inches Under without one. I (mostly) succeeded. The exploration and endgame completionist goals are very satisfying to accomplish, and the story is more straightforward than Supraland. I enjoyed the new abilities and as always, love the sense that everything in the game is intentional.
If you feel like you've broken the game, you haven't - you've just discovered another secret area.

Awesome gameplay and puzzles!