By deleting notes from the chords, we can make a much simpler and playable version of the piece. You can go as simple as you like, right down to just melody and bass line if you want - the choice is yours. A before and after of the first four bars are given below and then the whole piece simplified using a similar process.

Tip: Try to keep the same number of notes for each chord. So if your first chord contains three notes, then it would generally work well to keep the remaining chords at three notes also. Three can certainly be exceptions, especially at high points or places where you want extra emphasis.