Good job on your 1st game. In that you are victorious.
The ant theme is good, but you aren't taking much advantage of it. There are long stretches where nothing happens. It makes sense if you are going to add more enemies and obstacles as the player completes multiple passes. Bit it is still monotonous. Especially if you miss the jump off the ramp returning to the 1st water hazard. Also, there could be more game mechanics that meet the ant theme beyond a standard side scroller.