I like it, the things I see wrong with it is
- the house
I don't really feel as if it goes with the level. I cannot make houses at all and I have trouble creating one that looks good with whatever I make. I'm not going to attempt to tell you what could be done to improve it because I'm probably the last person you should be taking advice on about how houses should look.
- swamp tiles
I like full swamp tiles and not just half of them. I always hate it when I go up to slash some swamp and realize I can't because it's not a full swamp tile. The corners do not really matter in most cases if it's done right however if you think it will look better go for it.
- grass to dirt
I'm not a fan of the darker grass to dirt tiles that you're using for a majority of the paths. I just don't like it that much, again personal preference. As for mixing them they I have on occasion done that because of the current 'fad' thats going on with making over complicated levels but that's for another conversation. I no longer do it because I feel adding lots of detail actually makes levels ugly and sometimes hinders gameplay.
I do like how you went easy on the grass detail and I like the overall layout of the level, the cliff positioning and tile placement.