most things i wanted to say already been said by others, but maybe one suggestion on the Grid/Land (the walkable place), u could add something like visual cue (like poles to reference u could put the bridge there) so you don't need to give tutorial, imo, player will often notice that something like a bridge can be placed there, but this is arguable of course -- whether player will notice it or not.
overall, the game is fun, graphics, music, art-style is matching, color too :3
and after many nekos fall into the water, i could finally finish stage 5 (this stage is the most interesting to me, cause it challenging, managing two nekos at the same time add more spice to the game).