饾挾饾挿饾搱饾憸饾搧饾搳饾搲饾憭 饾捀饾捑饾搩饾憭饾搨饾挾
my tips:
1: make the platform hitbox bigger
2: make the spike hitboxes smaller
3: don't change the background
4: make the dash a bit faster
5: make some dynamic movement in the moving objects'
I hope I helped :D