Opinion on these tiles
 

My Friend Suruku asked if I could post these pictures to ask for suggestions towards improving his tileset.

They look good just the house doesn't seem to fit in that environment in the second screeny

I know the umbrella are probably NPC but the cel-shading with it doesn't go with the rest of the level. How could be brighter aswell, other awesome :P

Roof tiles / house in general looks ugly, umbrellas are cool

in my eyes first find one style you will work with :O
nothing fits with the other things ^^

I like the inside a lot...the beach looks bad....No offense :)

A few suggestions for the second screenshot with the beach tiles:

Work on the sand<->grass and sand<->water tiles the joins need to look smoother right now they are quite abrupt.

The water needs some work, not sure what effect he's going for but it looks a little grainy for water. If he is going for being able to see the sand underneath it needs some work.

The shells need downsizing also because they are gigantic compared to everything else, unless it is some sort of special beach with giant shells.

For the balloons / umbrellas the outlines seem way too thick which makes them look out of place with everything else.

I'll post his replies later, he's been offline every time I've been on

Not a big fan but it looks like you have some potential for the future.