This was very fun! I was engaged at all time during main gameplay loop. Double attacks on the same wall are unfair (in a joke sense).
Also there is minor bug (?) in intro sequence: after cat teleports from ledge to boxes if you go back to lower base of the staircase kitty will disappear from boxes, and you can’t go inside the sub. I fixed it by coming back to upper level of the boat and coming back (by this kitty should be back on the boxes). It’s very minor but I thought I could share my experience. Teleporting cat is cool.