I really love the concept of your game and have played it for about an hour over 3 sessions. I love modern spins on single screen platform games. However, the game is really hard. Frustratingly hard! It reminds me of how tough 8-bit games were in the 1980s.
Level 1 is manageable and I can complete that without dying. Level 2 ramps up the difficulty curve with the bee and cactus head. I have only got to level 3 twice and get very quickly killed by the mouse in the airplane that drops fire. I dread to think how hard the last stages are! I'm not sure I have the skill set or patience to progress any further.
It would be awesome if you had an easier mode, where enemies spawned slower and minimize the number of flying enemies to one or none at all.
Also, having to hold down a button to hold onto something starts to cause my hand to ache. If you could press the button once to grab something then again to release would help or maybe just auto pick it up.
The graphics and animation in between levels are really good and like I said earlier, this is a great concept.