This week's exclusive look at the official UK App Store charts highlight just how fierce the competition is, particularly on iPhone.

Warner Bros.' HeadsUp!  has been toppled by Disney's Castle of Illusion  on the iPhone paid charts, while Micromon, Football Chairman, Doodle Jump  and Car Chase SImulator  have all fallen out of the top 10. 

Elsewhere things are looking familiar, with Minecraft, Circle the Dot,  and Star Wars: Commander  all holding on to their places at the top of the respective iPad and iPhone charts. 

New entries such as LEGO The Lord of the Rings, Piggy Break,  and Make Them Fall  will all be hoping that they can cement their places in the top 10. 

Of course, only time will tell if they've got the legs to stick around for the long haul, so come back next week to see which games prove their worth, and which ones bite the dust. 

Official UK App Store Charts August 24 - August 31, 2014

iPhone Paid Apps

1. Castle of Illusion Starring Mickey Mouse (Disney)
2. Minecraft: Pocket Edition (Mojang)
3. Motorsport Manager (Christian West)
4. Heads Up! (Warner Bros.)
5. Tipping Point (Barnstorm Games)
6. Construction Simulator 2014 (astragon Software)
7. The Chase (Barnstorm Games)
8. Monopolgy (EA)
9. LEGO The Lord of the Rings (Warner Bros.)
10. Table Tennis Touch (Yakuto)

iPhone Free Apps

1. Circle The Dot (Ketchapp)
2. Piggy Break (Gilbert Jolly)
3. Make Them Fall (Ketchapp)
4. Star Wars: Commander (LucasArts)
5. Swing Copters (Dong Nguyen)
6. The Tower! (Ketchapp)
7. Roulettist (Kamagames)
8. Criminal Case (Pretty Simple)
9. RollerCoaster Tycoon 4 Mobile (Atari)
10. Doodle Devil (JoyBits)

iPad Paid Apps

1. Minecraft: Pocket Edition (Mojang)
2. Castle of Illusion Starring Mickey Mouse (Disney
3. Tipping Point (Barnstorm Games)
4. LEGO The Lord of the Rings (Warner Bros.)
5. Terraria (505 Games)
6. Motorsport Manager (Christian West)
7. The Chase (Barnstorm Games)
8. Table Tennis Touch (Yakuto)
9. Construction Simulator 2014 (astragon Software)
10. Football Manager Handheld 2014 (Sega)

iPad Free Apps

1. Star Wars: Commander (LucasArts)
2. Swing Copters (Dong Nguyen)
3. Make Them Fall (Ketchapp)
4. Criminal Case (Pretty Simple)
5. Cheating Tom (Crazy Labs)
6. RollerCoaster Tycoon 4 Mobile (Atari)
7. Mahjong Ultimate HD (Maurits Filet)
8. Circle The Dot (Ketchapp)
9. Icebreaker: A Viking Voyage (Nitrome)
10. Bubble Witch 2 Saga (King)