Another new strat I came up with that might be able to be improved.

-Run onto the spring, ignoring the first target. -Time (or spam) neutral-B so it breaks the target on the glass. -Hit the top target. -Hit the left target. -Use a down-B near the target under the glass. This will take care of that target, the one between the platforms, and the one which was skipped earlier. -Hit the target under the spring. -Land on the left platform and hit the lower left target with a d-tilt. -Hit the upper left platform. -Hit the middle platform.