Fun game with great art, brought me back to early legend of zelda days. The Boxers can sometimes trap you in a wall which isn't too fair, maybe when they collide with you give them a bit of velocity away from the character to give them a breather. Maybe also a transition between levels would be good. Like you kill all the enemies, the a stairway down opens up or something. Just to make the transition a little less jarring.
Otherwise great work and good use of temperature mechanics!