At first, it was pretty uncomfortable to get used to the behaviour of the controls.
But if you give the game a chance and practise a bit, you'll get a feeling for the grapple, its speed
and get an eye for the distance and right timing.
Even if you now got comfy to the controls, reach higher scores easier;
the game itself stays entertaining, although there seems to be no change in the enemy spawn interval
or the level complexity (some are easier, some are more difficult - it's a random up and down).
The "rope" of the grapple is white. This is sometimes pretty confusing with white backgrounds.
Not sure if this is part of the game, but a yellow rope would be way better.
Sometimes there are no enemies in the level
(but you can hear the spawn sound). This happened rarely though.
Good work! Cheers!