Too simplified, glitches; 3 out of 5.
Love is a complex emotion. The music and the heartbeat are nice, and one could debate on whether or not the use of colour was good or not.
However, the actual journey the player goes through, was not good. It simplified love, as if it was merely the act of moving. It isn't.
The words and sentences used in this game were full of clichés. They were empty and had no real meaning, precisely because they were so interchangeable with any kind of simple emotion a child may have, without understanding the meaning behind them.
If instead you had given more precious examples of why this love was so powerful, or why it was so special, or given a journey to the player with less abstract gameplay, or story, it would've been emotionally more powerful.
Simple love happens all the time and as such your game can easily been seen as cliché. Love is especially powerful when they are combined with another emotion, in a compelling story. The love of a man or woman means far more when that person has been through tragedy, and love was their salvation. It gives extra worth and value to the power of love, and also immediately demonstrates that power.
My suggestion is that you don't oversimplify love next time, nor should you neglect to demonstrate its power.
Also, run + jump don't work, except when you are moving to the left. So you have to jump and then go down or right. Tiny glitch.
So, improve your emotional story, and get rid of that glitch; 3 out of 5.