Hej, great game for your first game-jam entry! I love the minimalistic art style (I'm a sucker for pixel graphics) and you have multiple levels with some sort of difficulty ramp. Great effort!
Here are some pointers from me:
1) I'd let the robot go down to 0 hearts, that gives you more than 2 jumps and would probably allow you to be a bit more flexible with the level design.
2) Some more difficult levels could be nice.