Not bad, but the difficulty level should have increased more. Either with faster moles or more moles (or both).
Making a mistake ends the game. With the current difficulty, that seems OK, but if you could have included the increasing difficulty, you could also have been a bit more forgiving with mistakes and had a number of "lives".
The important thing is that you created a fully working game in a week and that's a successful achievement. Nice one! :-)