Very very cool chords on display, and the grace notes added to the right hand of your keys sounds great in context.

For added variation, why not write some minor edits into the pattern for your pad/lead? When approaching 4 minutes, it will be more difficult to hold the attention of your average listener. I think there's a good opportunity at 2:32 when that strong melody returns. Experiment, and have fun with it.

Would also be great to hear some more significant changes in the overall volume of this track, would aid in dynamic and really sell the more instrument-full sections when they all come in full-strength. I can see some minor variations, but no visual tells that define separate sections of the song, or 'events on the timeline'.

Well-done, and thank you for sharing : )