Hi WILL,
downloaded and tried as you mentioned so i give feedback.

Maybe it's premature to say something at this stage because you know
better than me what to do next but, the first thing i don't like is how
the screen is moving. As far as the tiled bg stays in the window size don't
scroll it, it should remain centered. The scrolling effect can be added in
bigger rooms that can't stay in the window size.

Also, i would suggest to descrease the tile size at 32x32 maybe, it can
give a better looking feel to it.

For the rest as i said it's too early to say something, i just wait to see what
are you up next! I would leave sfx and music at the end, focusing on
leveldesign and gfx first. The gameplay it's all there, simple and clean, it
just need a better look and feel

Bye!