It looks fine to me. That looks like krausen on the top so it is fermenting. Just give it some more time.
BUCKETS AND BUBBLING: I like to see the bubbles but bucket lids do tend to leak so you may never see them. I have 3 bucket fermenters, one of which always bubbles, on that never bubbles, and one that has a mind of its own about whether to bubble or not. If you are worried, open the fermenter (like you did) and look for krausen, the browninsh bubbling stuff or the ring it leaves on the side of the bucket. If you don't see either sign at the end of the third day, use a hydrometer to see if the gravity has changed. If it hasn't changed, add new yeast. This rarely happens unless you do something to kill all the yeast though.