Nice game with a lot of potential. I liked the rope and knockback, which work well with pushing. I could infer how stamina and turn worked, but some explanation would have been helpful. Same for knockback range, enemy types, etc. The level progression was certainly good until the mine level, where it suddenly became very difficult. Smoothing this out would help.
Regarding the progression, one question is whether you intend to continue this as a puzzle platformer game with fixed set of levels, or as a tactical game with randomized enemies, objects, etc. This will determine the nature of the levels, restart mechanics, permadeath, etc. The core game mechanics would work both ways, but the enemies, mines, stamina etc. feel more suited to a randomized tactical game.
When I died in the mine level the game kept looping, with the enemies moving around until I restarted. In the portal level my browser simply crashed each time I tried to use a portal.
Good graphics and audio. Overall this is very neat. All the best!