Hi Dirk,

The problem with the canon, does appear to be linked to the physics in the stage 3 upload. I bought a cannon straight away and I can move it without any real problems. Then, I switched to the bulldozer, moved a bunch of blocks around (incidentally, it left the cannon controls on screen when I did this). When I switched back to the cannon it was slower. I switched to the hand and tried stacking some blocks (for some reason it appeared that everytime I picked up a block, I picked up the cannon). When I went back to the cannon again, it was practically dead.

Hope this helps.

If you need more specific tests performed, let me know and I'll see what I can do.