Heyyy! Thanks so much for your comment! <3 I think you're referring to the bell sound. I used the Korg Triton VSTi, which primarily features a blend of bell tones. On top of that, I added a phaser, a stereo chorus, and a long reverb for extra depth
So that's why it reminds me of 90s electronic music ^^ I think would use the Triton too if it weren't so expensive. For now, a free emulator of the Kawai K1 will do.