Overall a fun little game, but I found it was quite easy. I got to 296 within my second try. A few notes would be:

-Add more obstacle variations (visually)

-Change the speed the higher your score, but also adjust the obstacle locations 

-I would show 3 hearts rather than two, as to not confuse players

This being said, I would love to see where this game would go, if it were to continue development!