Wow, nice puzzle game! The concept is really simple and easy to understand, so it was really easy to get into! The first two levels also did a good job of letting players know all that they need to know to play the game, so well done on that! The pacing and difficulty curve of the levels were good too, they never got too hard too quickly, which I appreciated! Its also nice that even though there are enemies in the game, you always make sure to put your players in a safe space in the beginning that would allow them to see how they should plan their next course of action. The way you introduced new elements in the game was also done really well, it never got too overwhelming too fast. I also want to say that I really love the character designs (they look so cute)! Plus the music was really good! The song felt like it took the between the intensity of an action game and the pace of a puzzle game (which is perfectly fitting for this game)! The sound effects were also really good and matched well with their respective actions (especially the slime).
Now for some of the criticisms, I feel like the game could have really benefited from a restart button. I only had the need to restart a level once, but it took so long to wait for the animation where I explode myself to finish. This can stop the momentum of a game when players just realize the solution and want to apply it as soon as they can or if they accidentally explode themselves by mistake. The levels could also be a bit harder, as it usually took just one look around the room to solve the puzzle, but it was fun nonetheless. Also, I don't know if it's intentional, but I think the blast hurtbox lasts for too long. There was one level where I was above two enemies and had to explode the floor in order to get to the bottom floor. After exploding the floor, the player didn't instantly go back to the start and was still affected by physics, so even though the character sprite was gone, the blast radius marker was still there and it fell and killed the two enemies. All of these aren't really major issues, but more just nitpicks, so good job on that!
Also just want to note the first time I loaded the game the camera was zoomed in, but a browser refresh fixed it, so not that big of a deal.
Overall, it was a nice short puzzle game that I really enjoyed! The characters look fun and the music was great to listen too. I like the concept a lot and it could probably be explored even further (maybe with physic too??). Nice work guys!