With all those guesses, the puzzle is now solved. 😀
In order:
Yes, there is a C.
Yes, there is a K.
Yes, there is a D.
Yes, there is an L.
Yes there is a B.
Sorry, there is no W.
Since the guess of "B" completed the solution, the next game belongs to tickleterror. 😀
DUMB/LUCK
Letters used: M, U, C, K, D, L, B
None: E, T, S, H, A, I, R, O, P, N, Y, J, W