Hi,
I've been using the Unity engine for over 2 years and have experience with gameplay programming, UI, inputs, shaders, implementing plugins, data serialization and more. I worked on a match-3 type game that can be seen in my freelancer portfolio. I'm currently working on a 3d jrpg style game, I can send you some samples if you contact me.
I don't do graphics myself, but I have a coworker that does 2d, 3d and animations that would be doing the graphics on this project (included in the bid). We can talk about this further if you contact me.
Unless I'm mistaken, you want the game made from start to finish based on the game mechanics you described in the project description. Even though it's a simple game, implementing the gameplay, game content, plugins, art assets, testing, polishing etc. is a big undertaking, which is why my bid is higher than your project budget. My bid is an estimate and could change (up or down) but unless I've completely misjudged the scope of the project, it would still be higher than your budget.
I'm hoping you contact me so we can discuss the project in greater details; the character limit on the bid isn't large enough for me to go over everything and bring up every question I have about the project.
Thank you for your consideration,
Martin