Overall I think this is a good game, but it needs a bit of work to reach it's full potential.
Good things:
Great palette and use of palette changes and lighting.
Fun gameplay, if a little too much filler passages at times.
Good overall conceit.
Bugs:
Right-clicking on the screen creates a firewall effect that harms the player but not enemies.
Problems:
No savegame!!!
No explanation of controls in download file. Fine if you've got internet access, if not...
InCREDIBLY slow. Try running this on an atom processor. For a game with this low a resolution, it -should- run on a gameboy.
Hitboxes are unclear - one assumes the sword is the edge of the hitbox, but it's in front of the swish of air in front of the sword that is the edge. This leads the player to get too close and get hurt.
No fullscreen and screen does not expand properly for non-standard resolutions (1078x600)
Unclear at times - NPC's ask questions and it's not clear whether you're supposed to or able to interact.
Dead end tunnels.
Suggestions:
Clicking 'Q' on the piggies could teleport back to the previous piggie, so that you can 'Q' yourself back through the levels but not right back to the start unless you want to.